feat: resource consumption rate display in village panel

Village panel now shows daily consumption rates alongside stockpiles (e.g. Food: 15 (-2/d), Wood: 7 (-1/d)). Rates are computed over a rolling 200-tick (~1 day) window by summing item_consumed economic events. The rate display only appears when non-zero, keeping the panel clean until actual consumption occurs. Closes the feedback loop: events show individual transfers, rates show aggregate trends.
feat: simulation speed control with bracket keys
2026-07-09 01:18:33 +02:00 · 2026-07-09 00:25:57 +02:00 · 2026-07-09 00:23:00 +02:00 · 2026-07-09 00:19:14 +02:00 · 2026-07-09 00:16:52 +02:00 · 2026-07-09 00:09:50 +02:00
409 changed files with 26821 additions and 610 deletions
@@ -2,3 +2,22 @@ root = true
 [*]
 charset = utf-8
 end_of_line = lf
 insert_final_newline = true
 indent_style = space
 indent_size = 4
 trim_trailing_whitespace = true
 [*.gd]
 indent_style = tab
 indent_size = 4
 tab_width = 4
 [*.{json,yaml,yml}]
 indent_size = 2
 [*.{bat,cmd}]
 end_of_line = crlf
 [*.md]
 trim_trailing_whitespace = false
@@ -1,7 +1,74 @@
-# Normalize EOL for all files that Git considers text files.
+# Use deterministic line endings on every platform.
 * text=auto eol=lf
 # Godot source and serialized resources
 *.gd text eol=lf
 *.gd.uid text eol=lf
 *.gdextension text eol=lf
 *.gdnlib text eol=lf
 *.tscn text eol=lf
 *.tres text eol=lf
 *.godot text eol=lf
 *.import text eol=lf
 *.shader text eol=lf
 *.gdshader text eol=lf
 *.gdshaderinc text eol=lf
 # Common source, configuration, and documentation formats
 *.cs text eol=lf
 *.cfg text eol=lf
 *.ini text eol=lf
 *.json text eol=lf
 *.md text eol=lf
 *.toml text eol=lf
 *.txt text eol=lf
 *.xml text eol=lf
 *.yaml text eol=lf
 *.yml text eol=lf
 *.sh text eol=lf
 *.ps1 text eol=lf
 # Native Windows command scripts
 *.bat text eol=crlf
 *.cmd text eol=crlf
 # SVG is text; the remaining asset formats must never receive EOL conversion.
 *.svg text eol=lf
 *.bmp binary
 *.dds binary
 *.exr binary
 *.gif binary
 *.hdr binary
 *.ico binary
 *.jpeg binary
 *.jpg binary
 *.ktx binary
 *.png binary
 *.tga binary
 *.webp binary
 *.blend binary
 *.fbx binary
 *.glb binary
 *.3ds binary
 *.dae text eol=lf
 *.gltf text eol=lf
 *.mtl text eol=lf
 *.obj text eol=lf
 *.mp3 binary
 *.ogg binary
 *.wav binary
 *.flac binary
 *.mp4 binary
 *.webm binary
 *.avi binary
 *.mov binary
 *.otf binary
 *.ttf binary
 *.woff binary
 *.woff2 binary
 *.7z binary
 *.gz binary
 *.rar binary
 *.tar binary
 *.zip binary
 *.pck binary
@@ -1,44 +1,82 @@
-# Godot import cache
+# Godot 4 editor data and imported asset cache
 .import/
 # Godot editor generated files
 .godot/
-# Export templates and builds
+# Godot 3 imported asset cache
 .import/
 # Local export output (keep export_presets.cfg tracked)
 /export/
 /exports/
 /build/
 /builds/
 /dist/
-# Mono / C#
+# Godot C# / Mono generated files
 .mono/
 data_*/
 mono_crash.*
 # Visual Studio / Rider
 .vs/
 .idea/
 *.csproj
 *.sln
 *.user
 *.DotSettings.user
-# macOS
+# Godot and application crash/log output
-.DS_Store
+crash_handler*
 # Linux
 .directory
 # Windows
 Thumbs.db
 desktop.ini
 # Logs
 *.log
-# Temporary files
+# Local environment and secrets
-*.tmp
+.env
-*.bak
+.env.*
 !.env.example
-# Godot crash reports
+# Editors and IDEs
-crash_handler*
+.idea/
 .fleet/
 .vs/
 .vscode/
 *.code-workspace
 *.suo
 *.user
 *.userosscache
 *.sln.docstates
 *.DotSettings.user
 # Editor swap, backup, and temporary files
 *.bak
 *.orig
 *.rej
 *.swp
 *.swo
 *.temp
 *.tmp
 *~
 ~*.dll
 .#*
 \#*\#
 # macOS metadata
 .DS_Store
 .AppleDouble
 .LSOverride
 Icon?
 ._*
 .DocumentRevisions-V100/
 .Spotlight-V100/
 .TemporaryItems/
 .Trashes/
 .VolumeIcon.icns
 .com.apple.timemachine.donotpresent
 # Windows metadata
 Thumbs.db
 Thumbs.db:encryptable
 ehthumbs.db
 ehthumbs_vista.db
 [Dd]esktop.ini
 $RECYCLE.BIN/
 *.stackdump
 # Local quality gate logs
 logs/quality/
 # Linux desktop and trash metadata
 .directory
 .Trash-*
@@ -0,0 +1,142 @@
 # Agent working guide for The Steward
 This repository is a Godot 4.7 simulation prototype. Treat it as a living
 systems project, not a content dump. The expected working style is:
 ## Default development loop
 1. Read the relevant roadmap/docs before changing code.
   - Start with `docs/README.md`.
   - Use `docs/LEARNING_ROADMAP.md` for the current next item.
   - Use focused plans such as `docs/RESOURCE_NODE_MIGRATION.md` only within
     their stated scope.
 2. Inspect the current code and tests before assuming roadmap status is still
   accurate. The user often changes things in parallel.
 3. Implement the smallest useful vertical slice.
   - Prefer functional systems progress over broad polish.
   - Avoid deep rabbit holes unless the current slice needs them.
   - Keep Jajce visual/design work bounded; prioritize simulation behavior,
     validation, WorldEnvironment ambience, and readable presentation.
 4. Validate with the local quality gate.
 5. Update the smallest relevant docs after completing a phase or decision.
 6. Commit with a conventional commit message.
 ## Validation
 Only Godot 4.7 matters for this project.
 Use the project quality gate from PowerShell:
 ```powershell
 powershell -ExecutionPolicy Bypass -File .\tools\quality.ps1
 ```
 For changed-file quick checks:
 ```powershell
 powershell -ExecutionPolicy Bypass -File .\tools\quality.ps1 -Changed
 ```
 The quality scripts isolate Godot's user profile under `logs/quality/godot_profile`
 so headless Godot 4.7 can run without crashing on blocked Windows app-data paths.
 Do not remove that behavior.
 Useful extra checks:
 ```powershell
 git diff --check
 ```
 If touching `main.tscn` or runtime wiring, also do a direct Godot 4.7 headless
 boot when practical.
 ## Architecture direction
 Preserve the simulation/presentation boundary.
 - Simulation state owns authority: resources, storage, NPC inventory, events,
  task state, target IDs, positions, RNG streams, and save records.
 - World nodes are presentation and interaction geometry. They may register or
  bind state, but they should not become the only owner of persistent facts.
 - NPCs store stable IDs, not `NodePath`s or node references.
 - Target discovery should go through `ActiveWorldAdapter` and
  `ActionTargetResolver`.
 - Visual movement belongs to `WorldViewManager`/`NpcVisual`; decision and task
  execution belong to the simulation systems.
 When adding a system, first prove the contract with one real gameplay use case.
 Do not extract generic frameworks before multiple real consumers justify them.
 ## Resource and target rules
 Do not reintroduce abstract food/wood task-zone fallbacks.
 Current resource gathering should use finite `ResourceNode` instances:
 - food: berries, animal camps, village stock, future farms/crops;
 - wood: trees, wood piles, future forestry contexts.
 Resource additions should preserve:
 - stable unique IDs;
 - food/wood coverage;
 - meaningful placement context;
 - reachable interaction points;
 - `safety_risk`, `comfort_distance`, and `discovery_priority` metadata;
 - clear player interaction ranges so nearby storage/activity/resource targets
  do not overlap accidentally.
 Storage uses `StorageNode`. Rest, study, and patrol use `ActivitySite`. Do not
 turn these back into generic marker zones.
 ## Testing expectations
 Add or update headless scenarios when a change affects:
 - resource conservation;
 - target selection or reservations;
 - save/load or schema behavior;
 - navigation/reachability assumptions;
 - player/NPC parity;
 - deterministic continuation;
 - UI/debug state that represents real simulation facts.
 Keep tests deterministic. Prefer fixed seeds and stable IDs.
 ## Documentation expectations
 Update docs when the implemented behavior changes the roadmap, architecture, or
 current contract. Keep updates local:
 - `docs/LEARNING_ROADMAP.md` for next-item sequencing and milestone status;
 - `docs/RESOURCE_NODE_MIGRATION.md` for resource-target migration status;
 - `docs/SIMULATION_STATE_SCHEMA.md` for serialized state changes;
 - `docs/SIMULATION_DEFINITIONS.md` for action/profession/ID contracts;
 - `docs/BUILD_IN_PUBLIC_PLAN.md` for Jajce/demo/readability slices;
 - `docs/decisions/` only for durable architectural decisions.
 Do not duplicate full status tables across many docs. If docs and code differ,
 trust code/tests first, then update docs.
 ## Git expectations
 Preserve user changes. Check `git status --short` before editing and before
 committing. Do not use destructive cleanup commands unless explicitly asked.
 Use conventional commits, for example:
 - `feat: validate expanded resource discovery`
 - `fix: stabilize godot 4.7 headless validation`
 - `docs: capture agent workflow`
 Commit only after validation relevant to the change has passed.
 ## Product taste
 The project is aiming for a readable, magical simulation garden that can grow
 into a larger systemic game. Prefer honest visible cause-and-effect:
 - NPCs should walk to real resources, storage, and activity sites.
 - UI/debug overlays should explain actual simulation state.
 - Beauty work should represent real state rather than fake activity.
 - Each slice should leave the project easier to reason about than before.
@@ -0,0 +1,21 @@
 MIT License
 Copyright (c) 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
@@ -0,0 +1,52 @@
 ![Terrain3D Logo](/doc/docs/images/terrain3d.jpg)
 # Terrain3D
 A high performance, editable terrain system for Godot 4.
 ## Features
 * Written in C++ as a GDExtension addon, which works with official builds of Godot Engine
 * [Can be accessed](https://terrain3d.readthedocs.io/en/stable/docs/programming_languages.html) by GDScript, C#, and any language Godot supports
 * Terrains as small as 64x64m up to 65.5x65.5km (4295km^2) in non-contiguous and variable sized regions
 * Up to 32 textures
 * Up to 10 levels of detail for the terrain mesh
 * Foliage instancing, with up to 10 levels of detail, and a shadow impostor
 * Sculpting, holes, texture painting, texture detiling, painting colors and wetness
 * Imports heightmaps from [HTerrain](https://github.com/Zylann/godot_heightmap_plugin/), Gaea, World Creator, World Machine, Unity, Unreal and any tool that can export a heightmap. See [heightmaps](https://terrain3d.readthedocs.io/en/stable/docs/heightmaps.html)
 ## Games Using Terrain3D
 Please see the [featured games using Terrain3D](https://terrain3d.readthedocs.io/en/latest/docs/games.html) for examples of what it can do.
 ## Getting Started
 1. Read the [Introduction](https://terrain3d.readthedocs.io/en/stable/docs/introduction.html) to understand how this terrain system works.
 2. Read the [Installation & Upgrade](https://terrain3d.readthedocs.io/en/stable/docs/installation.html) instructions.
 3. Watch the [tutorial videos](https://terrain3d.readthedocs.io/en/stable/docs/tutorial_videos.html) and read through the documentation.
 4. For support, read [Getting Help](https://terrain3d.readthedocs.io/en/stable/docs/getting_help.html) and join our [Discord server](https://tokisan.com/discord).
 ## Credit
 Developed for the Godot community by:
 |||
 |--|--|
 | **Cory Petkovsek, Tokisan Games** | [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/twitter.png?raw=true" width="24"/>](https://twitter.com/TokisanGames) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/github.png?raw=true" width="24"/>](https://github.com/TokisanGames) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/www.png?raw=true" width="24"/>](https://tokisan.com/) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/discord.png?raw=true" width="24"/>](https://tokisan.com/discord) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/youtube.png?raw=true" width="24"/>](https://www.youtube.com/@TokisanGames)|
 | **Roope Palmroos, Outobugi Games** | [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/twitter.png?raw=true" width="24"/>](https://twitter.com/outobugi) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/github.png?raw=true" width="24"/>](https://github.com/outobugi) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/www.png?raw=true" width="24"/>](https://outobugi.com/) [<img src="https://github.com/dmhendricks/signature-social-icons/blob/master/icons/round-flat-filled/35px/youtube.png?raw=true" width="24"/>](https://www.youtube.com/@outobugi)|
 And the contribution team in [AUTHORS.md](https://terrain3d.readthedocs.io/en/stable/docs/authors.html) and on the right of the github page.
 ## Contributing
 Please see [CONTRIBUTING.md](https://github.com/TokisanGames/Terrain3D/blob/main/CONTRIBUTING.md) if you would like to help make Terrain3D the best terrain system for Godot.
 ## License
 This addon has been released under the [MIT License](https://github.com/TokisanGames/Terrain3D/blob/main/LICENSE.txt).
@@ -0,0 +1,48 @@
 # Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 # Import From SimpleGrassTextured
 #
 # This script demonstrates how to import transforms from SimpleGrassTextured. To use it:
 #
 # 1. Setup the mesh asset you wish to use in the asset dock.
 # 1. Select your Terrain3D node.
 # 1. In the inspector, click Script (very bottom) and Quick Load import_sgt.gd.
 # 1. At the very top, assign your SimpleGrassTextured node.
 # 1. Input the desired mesh asset ID.
 # 1. Click import. The output window and console will report when finished.
 # 1. Clear the script from your Terrain3D node, and save your scene.
 #
 # The instance transforms are now stored in your region files.
 #
 # Use clear_instances to erase all instances that match the assign_mesh_id.
 #
 # The add_transforms function (called by add_multimesh) applies the height_offset specified in the
 # Terrain3DMeshAsset.
 # Once the transforms are imported, you can reassign any mesh you like into this mesh slot.
@tool
 extends Terrain3D
@export var simple_grass_textured: MultiMeshInstance3D
@export var assign_mesh_id: int
@export var import: bool = false:
 	set = import_sgt
@export var clear_instances: bool = false:
 	set = clear_multimeshes
 func clear_multimeshes(value: bool) -> void:
 	get_instancer().clear_by_mesh(assign_mesh_id)
 func import_sgt(value: bool) -> void:
 	var sgt_mm: MultiMesh = simple_grass_textured.multimesh
 	var global_xform: Transform3D = simple_grass_textured.global_transform
 	print(
 		(
 			"Starting to import %d instances from SimpleGrassTextured using mesh id %d"
 			% [sgt_mm.instance_count, assign_mesh_id]
 		)
 	)
 	var time: int = Time.get_ticks_msec()
 	get_instancer().add_multimesh(assign_mesh_id, sgt_mm, simple_grass_textured.global_transform)
 	print("Import complete in %.2f seconds" % [float(Time.get_ticks_msec() - time) / 1000.])
@@ -0,0 +1 @@
 uid://bllcuwetve45k
@@ -0,0 +1,137 @@
 # Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 # This script is an addon for HungryProton's Scatter https://github.com/HungryProton/scatter
 # It provides a `Project on Terrain3D` modifier, which allows Scatter
 # to detect the terrain height from Terrain3D without using collision.
 #
 # Copy this file into /addons/proton_scatter/src/modifiers
 # Then uncomment everything below (select, press CTRL+K)
 # In the editor, add this modifier to Scatter, then set your Terrain3D node
 #@tool
 #extends "base_modifier.gd"
 #
 #
 #signal projection_completed
 #
 #
 #@export var terrain_node : NodePath
 #@export var align_with_collision_normal : bool = false
 #@export_range(0.0, 90.0, 0.1) var max_slope : float = 90.0
 #@export var enable_texture_filtering : bool = false
 #@export_range(0, 31) var target_texture_id : int = 0
 #@export var not_target_texture : bool = false
 #@export_range(0.0, 1.0, 0.01) var texture_threshold : float = 0.8
 #
 #var _terrain: Terrain3D
 #
 #
 #func _init() -> void:
 #display_name = "Project On Terrain3D"
 #category = "Edit"
 #can_restrict_height = false
 #global_reference_frame_available = true
 #local_reference_frame_available = true
 #individual_instances_reference_frame_available = true
 #use_global_space_by_default()
 #
 #documentation.add_paragraph(
 #"This is a modified version of `Project on Colliders` that queries Terrain3D
 #for heights without using collision. It constrains placement by slope or texture.
 #
 #This modifier must have terrain_node set to a Terrain3D node.")
 #
 #var p := documentation.add_parameter("Terrain Node")
 #p.set_type("NodePath")
 #p.set_description("Set your Terrain3D node.")
 #
 #p = documentation.add_parameter("Align with collision normal")
 #p.set_type("bool")
 #p.set_description(
 #"Rotate the transform to align it with the collision normal in case
 #the ray cast hit a collider.")
 #
 #p = documentation.add_parameter("Enable Texture Filtering")
 #p.set_type("bool")
 #p.set_description(
 #"If enabled, objects will only be placed based on the ground texture specified.")
 #
 #p = documentation.add_parameter("Target Texture ID")
 #p.set_type("int")
 #p.set_description(
 #"The ID of the texture to place objects on (0-31). Objects will only be placed on this texture.")
 #
 #p = documentation.add_parameter("Not Target Texture")
 #p.set_type("bool")
 #p.set_description(
 #"If true, objects will be placed on all textures EXCEPT the target texture.")
 #
 #p = documentation.add_parameter("Texture Threshold")
 #p.set_type("float")
 #p.set_description("The blend value required for placement on the texture.")
 #
 #
 #func _process_transforms(transforms, domain, _seed) -> void:
 #if transforms.is_empty():
 #return
 #
 #if terrain_node:
 #_terrain = domain.get_root().get_node_or_null(terrain_node)
 #
 #if not _terrain:
 #warning += """No Terrain3D node found"""
 #return
 #
 #if not _terrain.data:
 #warning += """Terrain3DData is not initialized"""
 #return
 #
 ## Review transforms
 #var gt: Transform3D = domain.get_global_transform()
 #var gt_inverse := gt.affine_inverse()
 #var new_transforms_array: Array[Transform3D] = []
 #var remapped_max_slope: float = remap(max_slope, 0.0, 90.0, 0.0, 1.0)
 #for i in transforms.list.size():
 #var t: Transform3D = transforms.list[i]
 #
 #var location: Vector3 = (gt * t).origin
 #var height: float = _terrain.data.get_height(location)
 #if is_nan(height):
 #continue
 #
 #var normal: Vector3 = _terrain.data.get_normal(location)
 #if not abs(Vector3.UP.dot(normal)) >= (1.0 - remapped_max_slope):
 #continue
 #
 #if enable_texture_filtering:
 #var texture_info: Vector3 = _terrain.data.get_texture_id(location)
 #var base_id: int = int(texture_info.x)
 #var overlay_id: int = int(texture_info.y)
 #var blend_value: float = texture_info.z
 ## Skip if overlay or blend != target texture, unless inverted
 #if ((overlay_id != target_texture_id or blend_value < texture_threshold) and \
 #(base_id != target_texture_id or blend_value >= texture_threshold)) != not_target_texture:
 #continue
 #
 #if align_with_collision_normal and not is_nan(normal.x):
 #t.basis.y = normal
 #t.basis.x = -t.basis.z.cross(normal)
 #t.basis = t.basis.orthonormalized()
 #
 #t.origin.y = height - gt.origin.y
 #new_transforms_array.push_back(t)
 #
 #transforms.list.clear()
 #transforms.list.append_array(new_transforms_array)
 #
 #if transforms.is_empty():
 #warning += """All transforms have been removed. Possible reasons include: \n"""
 #if enable_texture_filtering:
 #warning += """+ No matching texture found at any position.
 #+ Texture threshold may be too high.
 #"""
 #warning += """+ No collider is close enough to the shapes.
 #+ Ray length is too short.
 #+ Ray direction is incorrect.
 #+ Collision mask is not set properly.
 #+ Max slope is too low.
 #"""
@@ -0,0 +1 @@
 uid://g3opjh3m3iww
@@ -0,0 +1,25 @@
 [gd_scene load_steps=5 format=3 uid="uid://d3sr0a7dxfkr8"]
 [ext_resource type="Script" uid="uid://bp7r4ppgq1m0g" path="res://addons/terrain_3d/extras/particle_example/terrain_3D_particles.gd" id="1_gl3qg"]
 [ext_resource type="Material" uid="uid://el5y10hnh13g" path="res://addons/terrain_3d/extras/particle_example/process_material.tres" id="2_2gon1"]
 [ext_resource type="Material" uid="uid://ljo1wt61kbkq" path="res://addons/terrain_3d/extras/particle_example/grass_material.tres" id="3_qyjnw"]
 [sub_resource type="RibbonTrailMesh" id="RibbonTrailMesh_fwrtk"]
 shape = 0
 section_length = 0.18
 section_segments = 1
 [node name="Terrain3DParticles" type="Node3D"]
 script = ExtResource("1_gl3qg")
 instance_spacing = 0.25
 cell_width = 24.0
 grid_width = 5
 rows = 96
 amount = 9216
 process_material = ExtResource("2_2gon1")
 mesh = SubResource("RibbonTrailMesh_fwrtk")
 shadow_mode = 0
 mesh_material_override = ExtResource("3_qyjnw")
 min_draw_distance = 60.0
 particle_count = 230400
 metadata/_edit_lock_ = true
@@ -0,0 +1,69 @@
 // Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 shader_type spatial;
 render_mode skip_vertex_transform, cull_disabled, blend_mix;
 uniform vec2 wind_direction = vec2(1.0, 1.0);
 varying vec4 data;
 // A lot of hard coded things here atm.
 void vertex() {
 	// Wind effect from model data, in this case no vertex colors,
 	// so just use vertex Y component, including mesh offset
 	data[2] = (VERTEX.y + 0.55);
 	data[2] *= data[2]; // make non-linear
 	// Ribbon used as a grass mesh.. so pinch the top.
 	VERTEX.xz *= (1.0 - data[2]);
 	// Brighten tips
 	COLOR = mix(COLOR, vec4(1.0), smoothstep(0.9, 1.0, data[2]));
 	// Darken base, skip is scale is less than threshold, as this means "grow in" is occuring.
 	COLOR *= INSTANCE_CUSTOM[3] < 0.35 ? 1. : mix(1.0, 0.75, smoothstep(0.35, 0.0, data[2]));
 	// Save red/green shift for fragment
 	data.rg = INSTANCE_CUSTOM.rg;
 	// World space vertex
 	vec3 w_vertex = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
 	// Get wind force and scale from process()
 	float scale = pow(INSTANCE_CUSTOM[3] * INSTANCE_CUSTOM[3], 0.707);
 	float force = INSTANCE_CUSTOM[2] * data[2] * scale;
 	// Add some cheap jitter at high wind values
 	force -= fract(force * 256.0) * force * 0.05;
 	// Curve the result
 	force = pow(force, 0.707);
 	// These 2 combined result in a decent bend without resorting to matrices or pivot data.
 	// Lateral move and wobble
 	float lateral_wobble = sin(TIME * 2.0 * (1.0 + data.r + data.g)) * 0.25 * (1.0 - INSTANCE_CUSTOM[2]);
 	vec2 direction = normalize(wind_direction);
 	w_vertex.xz -= (vec2(-direction.y, direction.x) * lateral_wobble + direction) * force;
 	// Flatten
 	w_vertex.y -= INSTANCE_CUSTOM[2] * force * data[2];
 	// Save final wind force value for fragment.
 	data[3] = force;
 	VERTEX = (VIEW_MATRIX * vec4(w_vertex, 1.0)).xyz;
 	NORMAL = MODELVIEW_NORMAL_MATRIX * NORMAL;
 	BINORMAL = MODELVIEW_NORMAL_MATRIX * BINORMAL;
 	TANGENT = MODELVIEW_NORMAL_MATRIX * TANGENT;
 }
 void fragment() {
 	// Hard coded color.
 	ALBEDO = vec3(0.20, 0.22, 0.05) * (data[2] * 0.5 + 0.5);
 	ALBEDO.rg *= (data.rg * 0.3 + 0.9);
 	ALBEDO *= pow(COLOR.rgb, vec3(2.2));
 	// Modify roughness / specular based on wind force for added detail
 	float spec_rough = clamp(max(data[2], data[3]), 0., 1.);
 	ROUGHNESS = 1. - spec_rough;
 	SPECULAR = clamp(spec_rough * 0.25, 0., .15);
 	BACKLIGHT = vec3(0.33);
 	#if CURRENT_RENDERER == RENDERER_COMPATIBILITY
 	ALBEDO = pow(ALBEDO, vec3(0.4));
 	#endif
 }
@@ -0,0 +1 @@
 uid://dq3lfyp3u5oxt
@@ -0,0 +1,8 @@
 [gd_resource type="ShaderMaterial" load_steps=2 format=3 uid="uid://ljo1wt61kbkq"]
 [ext_resource type="Shader" uid="uid://dq3lfyp3u5oxt" path="res://addons/terrain_3d/extras/particle_example/grass.gdshader" id="1_nkru0"]
 [resource]
 render_priority = 0
 shader = ExtResource("1_nkru0")
 shader_parameter/wind_direction = Vector2(1, 1)
@@ -0,0 +1,275 @@
 // Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 // This is an example particle shader designed to procedurally place
 // particles like grass, small rocks, and other ground effects, on the terrain
 // surface by reading the Terrain3D data maps. It works in tandem with the
 // provided GDScript.
 shader_type particles;
 render_mode disable_velocity, disable_force;
 group_uniforms options;
 uniform sampler2D main_noise;
 uniform float main_noise_scale = 0.01;
 uniform vec3 position_offset = vec3(0.);
 uniform bool align_to_normal = true;
 uniform float normal_strength : hint_range(0.01, 1.0, 0.01) = 0.3;
 uniform bool random_rotation = true;
 uniform float random_spacing : hint_range(0.0, 1.0, 0.01) = 0.5;
 uniform vec3 min_scale = vec3(1.0);
 uniform vec3 max_scale = vec3(1.0);
 group_uniforms wind;
 uniform float noise_scale = 0.0041;
 uniform float wind_speed = 0.025;
 uniform float wind_strength : hint_range(0.0, 1.0, 0.01) = 1.0;
 uniform float wind_dithering = 4.0;
 uniform vec2 wind_direction = vec2(1.0,1.0);
 group_uniforms shapeing;
 uniform float clod_scale_boost = 3.0;
 uniform float clod_min_threshold : hint_range(0.0, 1.0, 0.001) = 0.2;
 uniform float clod_max_threshold : hint_range(0.0, 1.0, 0.001) = 0.5;
 uniform float patch_min_threshold : hint_range(0.0, 1.0, 0.001) = 0.025;
 uniform float patch_max_threshold : hint_range(0.0, 1.0, 0.001) = 0.2;
 group_uniforms filtering;
 uniform float condition_dither_range : hint_range(0.0, 1.0, 0.01) = 0.15;
 uniform float surface_slope_min : hint_range(0.0, 1.0, 0.01) = 0.87;
 uniform float distance_fade_ammount : hint_range(0.0, 1.0, 0.01) = 0.5;
 group_uniforms private;
 uniform float max_dist = 1.;
 uniform vec3 camera_position = vec3(0.);
 uniform uint instance_rows = 1;
 uniform float instance_spacing = 0.5;
 uniform uint _background_mode = 0u;
 uniform float _vertex_spacing = 1.0;
 uniform float _vertex_density = 1.0; // = 1/_vertex_spacing
 uniform float _region_size = 1024.0;
 uniform float _region_texel_size = 0.0009765625; // = 1/REGION_SIZE
 uniform int _region_map_size = 32;
 uniform int _region_map[1024];
 uniform vec2 _region_locations[1024];
 uniform highp sampler2DArray _height_maps : repeat_disable;
 uniform highp sampler2DArray _control_maps : repeat_disable;
 uniform highp sampler2DArray _color_maps : repeat_disable;
 // Defined Constants
 #define SKIP_PASS 0
 #define VERTEX_PASS 1
 #define FRAGMENT_PASS 2
 // Takes in world space XZ (UV) coordinates & search depth (only applicable for background mode none)
 // Returns ivec3 with:
 // XY: (0 to _region_size - 1) coordinates within a region
 // Z: layer index used for texturearrays, -1 if not in a region
 ivec3 get_index_coord(const vec2 uv, const int search) {
 	vec2 r_uv = round(uv);
 	vec2 o_uv = mod(r_uv,_region_size);
 	ivec2 pos;
 	int bounds, layer_index = -1;
 	for (int i = -1; i < 0; i++) {
 		if ((layer_index == -1 && _background_mode == 0u) || i < 0) {
 			r_uv -= i == -1 ? vec2(0.0) : vec2(float(o_uv.x <= o_uv.y), float(o_uv.y <= o_uv.x));
 			pos = ivec2(floor((r_uv) * _region_texel_size)) + (_region_map_size / 2);
 			bounds = int(uint(pos.x | pos.y) < uint(_region_map_size));
 			layer_index = (_region_map[ pos.y * _region_map_size + pos.x ] * bounds - 1);
 		}
 	}
 	return ivec3(ivec2(mod(r_uv,_region_size)), layer_index);
 }
 #if CURRENT_RENDERER == RENDERER_COMPATIBILITY
 	#define fma(a, b, c) ((a) * (b) + (c))
 #endif
 float random(vec2 v) {
 	return fract(1e4 * sin(fma(17.0, v.x, v.y * 0.1)) * (0.1 + abs(sin(fma(v.y, 13.0, v.x)))));
 }
 mat3 rotation_matrix(vec3 axis, float angle) {
 	float c = cos(angle);
 	float s = sin(angle);
 	float t = 1.0 - c;
 	vec3 n = normalize(axis);
 	float x = n.x;
 	float y = n.y;
 	float z = n.z;
 	return mat3(
 		vec3(t * x * x + c, t * x * y - z * s, t * x * z + y * s),
 		vec3(t * x * y + z * s, t * y * y + c, t * y * z - x * s),
 		vec3(t * x * z - y * s, t * y * z + x * s, t * z * z + c));
 }
 mat3 align_to_vector(vec3 normal) {
 	vec3 up = vec3(0.0, 1.0, 0.0);
 	if (abs(dot(normal, up)) > 0.9999) { // Avoid singularity
 		up = vec3(1.0, 0.0, 0.0);
 	}
 	vec3 tangent = normalize(cross(up, normal));
 	vec3 bitangent = normalize(cross(tangent, normal));
 	return mat3(tangent, normal, bitangent);
 }
 void start() {
 	// Create centered a grid
 	vec3 pos = vec3(float(INDEX % instance_rows), 0.0, float(INDEX / instance_rows)) - float(instance_rows >> 1u);
 	// Apply spcaing
 	pos *= instance_spacing;
 	// Move the grid to the emitter, snapping is handled CPU side
 	pos.xz += EMISSION_TRANSFORM[3].xz;
 	// Create random values per-instance, incorporating the seed, mask bits to avoid NAN/INF
 	float seed = fract(uintBitsToFloat(RANDOM_SEED & 0x7EFFFFFFu));
 	vec3 r = fract(vec3(random(pos.xz), random(pos.xz + vec2(0.5)), random(pos.xz - vec2(0.5))) + seed);
 	// Randomize instance spacing
 	pos.x += ((r.x * 2.0) - 1.0) * random_spacing * instance_spacing;
 	pos.z += ((r.z * 2.0) - 1.0) * random_spacing * instance_spacing;
 	// Lookup offsets, ID and blend weight
 	const vec3 offsets = vec3(0, 1, 2);
 	vec2 index_id = floor(pos.xz * _vertex_density);
 	vec2 weight = fract(pos.xz * _vertex_density);
 	vec2 invert = 1.0 - weight;
 	vec4 weights = vec4(
 		invert.x * weight.y, // 0
 		weight.x * weight.y, // 1
 		weight.x * invert.y, // 2
 		invert.x * invert.y  // 3
 	);
 	ivec3 index[4];
 	// Map lookups
 	index[0] = get_index_coord(index_id + offsets.xy, VERTEX_PASS);
 	index[1] = get_index_coord(index_id + offsets.yy, VERTEX_PASS);
 	index[2] = get_index_coord(index_id + offsets.yx, VERTEX_PASS);
 	index[3] = get_index_coord(index_id + offsets.xx, VERTEX_PASS);
 	highp float h[8];
 	h[0] = texelFetch(_height_maps, index[0], 0).r; // 0 (0,1)
 	h[1] = texelFetch(_height_maps, index[1], 0).r; // 1 (1,1)
 	h[2] = texelFetch(_height_maps, index[2], 0).r; // 2 (1,0)
 	h[3] = texelFetch(_height_maps, index[3], 0).r; // 3 (0,0)
 	h[4] = texelFetch(_height_maps, get_index_coord(index_id + offsets.yz, VERTEX_PASS), 0).r; // 4 (1,2)
 	h[5] = texelFetch(_height_maps, get_index_coord(index_id + offsets.zy, VERTEX_PASS), 0).r; // 5 (2,1)
 	h[6] = texelFetch(_height_maps, get_index_coord(index_id + offsets.zx, VERTEX_PASS), 0).r; // 6 (2,0)
 	h[7] = texelFetch(_height_maps, get_index_coord(index_id + offsets.xz, VERTEX_PASS), 0).r; // 7 (0,2)
 	vec3 index_normal[4];
 	index_normal[0] = vec3(h[0] - h[1], _vertex_spacing, h[0] - h[7]);
 	index_normal[1] = vec3(h[1] - h[5], _vertex_spacing, h[1] - h[4]);
 	index_normal[2] = vec3(h[2] - h[6], _vertex_spacing, h[2] - h[1]);
 	index_normal[3] = vec3(h[3] - h[2], _vertex_spacing, h[3] - h[0]);
 	vec3 w_normal = normalize(
 		index_normal[0] * weights[0] +
 		index_normal[1] * weights[1] +
 		index_normal[2] * weights[2] +
 		index_normal[3] * weights[3]);
 	// Set the height according to the heightmap data
 	pos.y =
 		h[0] * weights[0] +
 		h[1] * weights[1] +
 		h[2] * weights[2] +
 		h[3] * weights[3] ;
 	// Offset, Rotation, Alignment.
 	TRANSFORM = mat4(1.0);
 	vec3 orientation = vec3(0., 1., 0.);
 	vec2 uv = (pos.xz) * main_noise_scale;
 	float noise = textureLod(main_noise, uv, 0.0).r;
 	float clods = smoothstep(clod_min_threshold, clod_max_threshold, noise) * clod_scale_boost;
 	float patch = smoothstep(patch_min_threshold, patch_max_threshold, noise);
 	float width_modifier = 1.0 + 3.0 * smoothstep(0., max_dist, length(camera_position - pos));
 	// Calculate scale
 	vec3 scale = vec3(
 		mix(min_scale.x, max_scale.x, r.x) * width_modifier,
 		mix(min_scale.y, max_scale.y, r.y) + clods,
 		mix(min_scale.z, max_scale.z, r.z) * width_modifier) * patch;
 	// Apply scale to offset
 	vec3 offset = position_offset * scale;
 	// Apply normal orientation
 	if (align_to_normal) {
 		orientation = mix(orientation, w_normal, normal_strength);
 		mat3 alignment = align_to_vector(orientation);
 		offset = alignment * offset;
 		TRANSFORM = mat4(alignment);
 	}
 	// Apply rotation around orientation
 	if (random_rotation) {
 		mat3 rotation = rotation_matrix(orientation, r.x * TAU);
 		TRANSFORM = mat4(rotation) * TRANSFORM;
 	}
 	// Filtering - Causes some particles to be rendered as degenerate triangles
 	// via 0./0. - Particles filtered this way are still processed by the GPU.
 	// For compatibility it seems we must shift as well.
 	// Surface slope filtering
 	if (surface_slope_min > w_normal.y + (r.y - 0.5) * condition_dither_range) {
 		pos.y = 0. / 0.;
 		pos.xz = vec2(100000.0);
 	}
 	// Read color map
 	highp vec4 c[4];
 	#define COLOR_MAP vec4(1., 1., 1., 0.5)
 	c[0] = index[0].z >= 0 ? texelFetch(_color_maps, index[0], 0) : COLOR_MAP; // 0 (0,1)
 	c[1] = index[1].z >= 0 ? texelFetch(_color_maps, index[1], 0) : COLOR_MAP; // 1 (1,1)
 	c[2] = index[2].z >= 0 ? texelFetch(_color_maps, index[2], 0) : COLOR_MAP; // 2 (1,0)
 	c[3] = index[3].z >= 0 ? texelFetch(_color_maps, index[3], 0) : COLOR_MAP; // 3 (0,0)
 	vec4 color_map =
 		c[0] * weights[0] +
 		c[1] * weights[1] +
 		c[2] * weights[2] +
 		c[3] * weights[3] ;
 	COLOR = color_map;
 	// Read control map
 	uint control = floatBitsToUint(texelFetch(_control_maps, index[3], 0).r);
 	bool auto = bool(control & 0x1u);
 	int base = int(control >>27u & 0x1Fu);
 	int over = int(control >> 22u & 0x1Fu);
 	float blend = float(control >> 14u & 0xFFu) * 0.003921568627450; // 1. / 255.
 	// Hardcoded example, hand painted texture id 0 is filtered out.
 	if (!auto && ((base == 0 && blend < 0.7) || (over == 0 && blend >= 0.3))) {
 		pos.y = 0. / 0.;
 		pos.xz = vec2(100000.0);
 	}
 	if (length(camera_position - pos) > max_dist) {
 		pos.y = 0. / 0.;
 		pos.xz = vec2(100000.0);
 	} else {
 		float fade_factor = 1.0 - smoothstep(max_dist * distance_fade_ammount, max_dist + 0.0001, length(camera_position - pos)) + 0.001;
 		scale.y *= fade_factor;
 		offset *= fade_factor;
 	}
 	// Apply scale
 	TRANSFORM[0] *= scale.x;
 	TRANSFORM[1] *= scale.y;
 	TRANSFORM[2] *= scale.z;
 	// Apply the position
 	TRANSFORM[3].xyz = pos.xyz + offset;
 	// Save Fixed 2 Random values for Reg/Green color randomness
 	CUSTOM.rg = r.rg;
 	// Save Y component scale pre-rotation
 	CUSTOM[3] = scale.y;
 }
 void process() {
 	// Extract world space UV from Transform Matrix
 	vec2 uv = (TRANSFORM[3].xz + CUSTOM.rg * wind_dithering) * noise_scale;
 	// Scaled wind noise, updated per instance, at process FPS. Passed to Vertex()
 	CUSTOM[2] = textureLod(main_noise, uv + TIME * wind_speed * normalize(wind_direction), 0.0).r * wind_strength;
 }
@@ -0,0 +1 @@
 uid://dce675i014xcn
@@ -0,0 +1,244 @@
 # Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 #
 # This is an example of using a particle shader with Terrain3D.
 # To use it, add `Terrain3DParticles.tscn` to your scene and assign the terrain.
 # Then customize the settings, materials and shader to extend it and make it your own.
@tool
 extends Node3D
 #region settings
 ## Auto set if attached as a child of a Terrain3D node
@export var terrain: Terrain3D:
 	set(value):
 		terrain = value
 		_create_grid()
 ## Distance between instances
@export_range(0.125, 2.0, 0.015625) var instance_spacing: float = 0.5:
 	set(value):
 		instance_spacing = clamp(round(value * 64.0) * 0.015625, 0.125, 2.0)
 		rows = maxi(int(cell_width / instance_spacing), 1)
 		amount = rows * rows
 		_set_offsets()
 ## Width of an individual cell of the grid
@export_range(8.0, 256.0, 1.0) var cell_width: float = 32.0:
 	set(value):
 		cell_width = clamp(value, 8.0, 256.0)
 		rows = maxi(int(cell_width / instance_spacing), 1)
 		amount = rows * rows
 		min_draw_distance = 1.0
 		# Have to update aabb
 		if terrain and terrain.data:
 			var height_range: Vector2 = terrain.data.get_height_range()
 			var height: float = height_range[0] - height_range[1]
 			var aabb: AABB = AABB()
 			aabb.size = Vector3(cell_width, height, cell_width)
 			aabb.position = aabb.size * -0.5
 			aabb.position.y = height_range[1]
 			for p in particle_nodes:
 				p.custom_aabb = aabb
 		_set_offsets()
 ## Grid width. Must be odd.
 ## Higher values cull slightly better, draw further out.
@export_range(1, 15, 2) var grid_width: int = 9:
 	set(value):
 		grid_width = value
 		particle_count = 1
 		min_draw_distance = 1.0
 		_create_grid()
@export_storage var rows: int = 1
@export_storage var amount: int = 1:
 	set(value):
 		amount = value
 		particle_count = value
 		last_pos = Vector3.ZERO
 		for p in particle_nodes:
 			p.amount = amount
@export_range(1, 256, 1) var process_fixed_fps: int = 30:
 	set(value):
 		process_fixed_fps = maxi(value, 1)
 		for p in particle_nodes:
 			p.fixed_fps = process_fixed_fps
 			p.preprocess = 1.0 / float(process_fixed_fps)
 ## Access to process material parameters
@export var process_material: ShaderMaterial
 ## The mesh that each particle will render
@export var mesh: Mesh
@export var shadow_mode: GeometryInstance3D.ShadowCastingSetting = (
 	GeometryInstance3D.ShadowCastingSetting.SHADOW_CASTING_SETTING_ON
 ):
 	set(value):
 		shadow_mode = value
 		for p in particle_nodes:
 			p.cast_shadow = value
 ## Override material for the particle mesh
@export_custom(PROPERTY_HINT_RESOURCE_TYPE, "BaseMaterial3D,ShaderMaterial")
 var mesh_material_override: Material:
 	set(value):
 		mesh_material_override = value
 		for p in particle_nodes:
 			p.material_override = mesh_material_override
@export_group("Info")
 ## The minimum distance that particles will be drawn upto
 ## If using fade out effects like pixel alpha this is the limit to use.
@export var min_draw_distance: float = 1.0:
 	set(value):
 		min_draw_distance = float(cell_width * grid_width) * 0.5
 ## Displays current total particle count based on Cell Width and Instance Spacing
@export var particle_count: int = 1:
 	set(value):
 		particle_count = amount * grid_width * grid_width
 #endregion
 var offsets: Array[Vector3]
 var last_pos: Vector3 = Vector3.ZERO
 var particle_nodes: Array[GPUParticles3D]
 func _ready() -> void:
 	if not terrain:
 		var parent: Node = get_parent()
 		if parent is Terrain3D:
 			terrain = parent
 	_create_grid()
 func _notification(what: int) -> void:
 	if what == NOTIFICATION_PREDELETE:
 		_destroy_grid()
 func _physics_process(delta: float) -> void:
 	if terrain:
 		var camera: Camera3D = terrain.get_camera()
 		if camera:
 			if last_pos.distance_squared_to(camera.global_position) > 1.0:
 				var pos: Vector3 = camera.global_position.snapped(Vector3.ONE)
 				_position_grid(pos)
 				RenderingServer.material_set_param(
 					process_material.get_rid(), "camera_position", pos
 				)
 				last_pos = camera.global_position
 		_update_process_parameters()
 	else:
 		set_physics_process(false)
 func _create_grid() -> void:
 	_destroy_grid()
 	if not terrain:
 		return
 	set_physics_process(true)
 	_set_offsets()
 	var hr: Vector2 = terrain.data.get_height_range()
 	var height: float = hr.x - hr.y
 	var aabb: AABB = AABB()
 	aabb.size = Vector3(cell_width, height, cell_width)
 	aabb.position = aabb.size * -0.5
 	aabb.position.y = hr.y
 	var half_grid: int = grid_width / 2
 	# Iterating the array like this allows identifying grid position, in case setting
 	# different mesh or materials is desired for LODs etc.
 	for x in range(-half_grid, half_grid + 1):
 		for z in range(-half_grid, half_grid + 1):
 			#var ring: int = maxi(maxi(absi(x), absi(z)), 0)
 			var particle_node = GPUParticles3D.new()
 			particle_node.lifetime = 600.0
 			particle_node.amount = amount
 			particle_node.explosiveness = 1.0
 			particle_node.amount_ratio = 1.0
 			particle_node.process_material = process_material
 			particle_node.draw_pass_1 = mesh
 			particle_node.speed_scale = 1.0
 			particle_node.custom_aabb = aabb
 			particle_node.cast_shadow = shadow_mode
 			particle_node.fixed_fps = process_fixed_fps
 			# This prevent minor grid alignment errors when the camera is moving very fast
 			particle_node.preprocess = 1.0 / float(process_fixed_fps)
 			if mesh_material_override:
 				particle_node.material_override = mesh_material_override
 			particle_node.use_fixed_seed = true
 			if x > -half_grid and z > -half_grid:  # Use the same seed across all nodes
 				particle_node.seed = particle_nodes[0].seed
 			self.add_child(particle_node)
 			particle_node.emitting = true
 			particle_nodes.push_back(particle_node)
 	last_pos = Vector3.ZERO
 func _set_offsets() -> void:
 	var half_grid: int = grid_width / 2
 	offsets.clear()
 	for x in range(-half_grid, half_grid + 1):
 		for z in range(-half_grid, half_grid + 1):
 			var offset := Vector3(
 				float(x * rows) * instance_spacing, 0.0, float(z * rows) * instance_spacing
 			)
 			offsets.append(offset)
 func _destroy_grid() -> void:
 	for node: GPUParticles3D in particle_nodes:
 		if is_instance_valid(node):
 			node.queue_free()
 	particle_nodes.clear()
 func _position_grid(pos: Vector3) -> void:
 	for i in particle_nodes.size():
 		var node: GPUParticles3D = particle_nodes[i]
 		var snap = Vector3(pos.x, 0, pos.z).snapped(Vector3.ONE) + offsets[i]
 		node.global_position = (snap / instance_spacing).round() * instance_spacing
 		node.reset_physics_interpolation()
 		node.restart(true)  # keep the same seed.
 func _update_process_parameters() -> void:
 	if process_material:
 		var process_rid: RID = process_material.get_rid()
 		if terrain and process_rid.is_valid():
 			RenderingServer.material_set_param(
 				process_rid, "_background_mode", terrain.material.world_background
 			)
 			RenderingServer.material_set_param(
 				process_rid, "_vertex_spacing", terrain.vertex_spacing
 			)
 			RenderingServer.material_set_param(
 				process_rid, "_vertex_density", 1.0 / terrain.vertex_spacing
 			)
 			RenderingServer.material_set_param(process_rid, "_region_size", terrain.region_size)
 			RenderingServer.material_set_param(
 				process_rid, "_region_texel_size", 1.0 / terrain.region_size
 			)
 			RenderingServer.material_set_param(process_rid, "_region_map_size", 32)
 			RenderingServer.material_set_param(
 				process_rid, "_region_map", terrain.data.get_region_map()
 			)
 			RenderingServer.material_set_param(
 				process_rid, "_region_locations", terrain.data.get_region_locations()
 			)
 			RenderingServer.material_set_param(
 				process_rid, "_height_maps", terrain.data.get_height_maps_rid()
 			)
 			RenderingServer.material_set_param(
 				process_rid, "_control_maps", terrain.data.get_control_maps_rid()
 			)
 			RenderingServer.material_set_param(
 				process_rid, "_color_maps", terrain.data.get_color_maps_rid()
 			)
 			RenderingServer.material_set_param(process_rid, "instance_spacing", instance_spacing)
 			RenderingServer.material_set_param(process_rid, "instance_rows", rows)
 			RenderingServer.material_set_param(process_rid, "max_dist", min_draw_distance)
@@ -0,0 +1 @@
 uid://bp7r4ppgq1m0g
@@ -0,0 +1,67 @@
 // Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 // This shader snippet draws a hex grid
 // To use it, add this line to the top of your shader:
 // #include "res://addons/terrain_3d/extras/shaders/hex_grid.gdshaderinc"
 // And this line at the bottom of your shader:
 // 	draw_hex_grid(uv2, _region_texel_size, w_normal, ALBEDO);
 mat2 rotate2d(float _angle) {
 	return mat2(vec2(cos(_angle),-sin(_angle)), vec2(sin(_angle), cos(_angle)));
 }
 void draw_hex_grid(vec2 uv, float texel_size, vec3 normal, inout vec3 albedo) {
 	float hex_size = 0.02;
 	float line_thickness = 0.04;
 	vec2 guv = (uv - vec2(0.5 * texel_size)) / hex_size;
 	// Convert UV to axial hex coordinates
 	float q = (sqrt(3.0) / 3.0 * guv.x - 1.0 / 3.0 * guv.y);
 	float r = (2.0 / 3.0 * guv.y);
 	// Cube coordinates for the hex (q, r, -q-r)
 	float x = q;
 	float z = r;
 	float y = -x - z;
 	// Round to the nearest hex center
 	vec3 rounded = round(vec3(x, y, z));
 	vec3 diff = abs(vec3(x, y, z) - rounded);
 	// Fix rounding errors
 	if (diff.x > diff.y && diff.x > diff.z) {
 		rounded.x = -rounded.y - rounded.z;
 	} else if (diff.y > diff.z) {
 		rounded.y = -rounded.x - rounded.z;
 	} else {
 		rounded.z = -rounded.x - rounded.y;
 	}
 	// Find the hex center in UV space
 	vec2 hex_center = vec2(
 	    sqrt(3.0) * rounded.x + sqrt(3.0) / 2.0 * rounded.z,
 	    3.0 / 2.0 * rounded.z
    );
 	// Relative position within the hex
 	vec2 local_pos = guv - hex_center;
 	vec2 lines_uv = local_pos;
 	float line = 1.0;
 	for (int i = 0; i < 6; i++) {
 		vec2 luv = lines_uv * rotate2d(radians(60.0 * float(i) + 30.0));
 		float dist = abs(dot(luv + vec2(0.90), vec2(0.0, 1.0)));
 		line = min(line, dist);
 	}
 	// Filter lines by slope
 	float slope = 4.; // Can also assign to (auto_slope * 4.) to match grass placement
 	float slope_factor = clamp(dot(vec3(0., 1., 0.), slope * (normal - 1.) + 1.), 0., 1.);
 	// Draw hex grid
 	albedo = mix(albedo, vec3(1.0), smoothstep(line_thickness + 0.02, line_thickness, line) * slope_factor);
 	// Draw Hex center dot
 	albedo = mix(albedo, vec3(0.0, 0.5, 0.5), smoothstep(0.11, 0.10, length(local_pos)) * slope_factor);
 }
@@ -0,0 +1 @@
 uid://mri8pfoj2mfk
@@ -0,0 +1,367 @@
 shader_type spatial;
 render_mode blend_mix,depth_draw_opaque,cull_back,diffuse_burley,specular_schlick_ggx,skip_vertex_transform;
 /* This is an example stripped down shader with maximum performance in mind.
 * Only Autoshader/Base/Over/Blend/Holes/Colormap are supported.
 * All terrain normal calculations take place in vetex().
 *
 * Control map indices are processed such that each ID only requires reading ONCE.
 * The following features: projection, detiling, and paintable rotation / scale
 * cannot work with this method, without the additional samples required for blending
 * between same ID textures with different values across indices.
 */
 // Defined Constants
 #define SKIP_PASS 0
 #define VERTEX_PASS 1
 #define FRAGMENT_PASS 2
 #define COLOR_MAP vec4(1.0, 1.0, 1.0, 0.5)
 #define DIV_255 0.003921568627450 // 1. / 255.
 // Inline Functions
 #define DECODE_BLEND(control) float(control >> 14u & 0xFFu) * DIV_255
 #define DECODE_AUTO(control) bool(control & 0x1u)
 #define DECODE_BASE(control) int(control >> 27u & 0x1Fu)
 #define DECODE_OVER(control) int(control >> 22u & 0x1Fu)
 #define DECODE_HOLE(control) bool(control >>2u & 0x1u)
 #if CURRENT_RENDERER == RENDERER_COMPATIBILITY
    #define fma(a, b, c) ((a) * (b) + (c))
    #define dFdxCoarse(a) dFdx(a)
    #define dFdyCoarse(a) dFdy(a)
 #endif
 // Private uniforms
 uniform vec3 _camera_pos = vec3(0.f);
 uniform float _mesh_size = 48.f;
 uniform uint _background_mode = 1u; // NONE = 0, FLAT = 1, NOISE = 2
 uniform uint _mouse_layer = 0x80000000u; // Layer 32
 uniform float _vertex_spacing = 1.0;
 uniform float _vertex_density = 1.0; // = 1./_vertex_spacing
 uniform float _region_size = 1024.0;
 uniform float _region_texel_size = 0.0009765625; // = 1./region_size
 uniform int _region_map_size = 32;
 uniform int _region_map[1024];
 uniform vec2 _region_locations[1024];
 uniform float _texture_normal_depth_array[32];
 uniform float _texture_ao_strength_array[32];
 uniform float _texture_roughness_mod_array[32];
 uniform float _texture_uv_scale_array[32];
 uniform vec4 _texture_color_array[32];
 uniform highp sampler2DArray _height_maps : repeat_disable;
 uniform highp sampler2DArray _control_maps : repeat_disable;
 uniform highp sampler2DArray _color_maps : source_color, filter_linear_mipmap_anisotropic, repeat_disable;
 uniform highp sampler2DArray _texture_array_albedo : source_color, filter_linear_mipmap_anisotropic, repeat_enable;
 uniform highp sampler2DArray _texture_array_normal : hint_normal, filter_linear_mipmap_anisotropic, repeat_enable;
 // Public uniforms
 uniform bool enable_texturing = true;
 uniform float blend_sharpness : hint_range(0, 1) = 0.5;
 uniform bool flat_terrain_normals = false;
 // Autoshader
 uniform float auto_slope : hint_range(0, 10) = 1.0;
 uniform float auto_height_reduction : hint_range(0, 1) = 0.1;
 uniform int auto_base_texture : hint_range(0, 31) = 0;
 uniform int auto_overlay_texture : hint_range(0, 31) = 1;
 // Macro Variation
 uniform bool enable_macro_variation = true;
 uniform vec3 macro_variation1 : source_color = vec3(1.);
 uniform vec3 macro_variation2 : source_color = vec3(1.);
 uniform float macro_variation_slope : hint_range(0., 1.)  = 0.333;
 uniform highp sampler2D noise_texture : source_color, filter_linear_mipmap_anisotropic, repeat_enable;
 uniform float noise1_scale : hint_range(0.001, 1.) = 0.04; // Used for macro variation 1. Scaled up 10x
 uniform float noise1_angle : hint_range(0, 6.283) = 0.;
 uniform vec2 noise1_offset = vec2(0.5);
 uniform float noise2_scale : hint_range(0.001, 1.) = 0.076; // Used for macro variation 2. Scaled up 10x
 // Varyings & Types
 varying vec3 v_normal;
 varying vec3 v_vertex;
 varying mat3 TBN;
 ////////////////////////
 // Vertex
 ////////////////////////
 // Takes in world space XZ (UV) coordinates & search depth (only applicable for background mode none)
 // Returns ivec3 with:
 // XY: (0 to _region_size - 1) coordinates within a region
 // Z: layer index used for texturearrays, -1 if not in a region
 ivec3 get_index_coord(const vec2 uv, const int search) {
 	vec2 r_uv = round(uv);
 	vec2 o_uv = mod(r_uv,_region_size);
 	ivec2 pos;
 	int bounds, layer_index = -1;
 	for (int i = -1; i < clamp(search, SKIP_PASS, FRAGMENT_PASS); i++) {
 		if ((layer_index == -1 && _background_mode == 0u ) || i < 0) {
 			r_uv -= i == -1 ? vec2(0.0) : vec2(float(o_uv.x <= o_uv.y), float(o_uv.y <= o_uv.x));
 			pos = ivec2(floor((r_uv) * _region_texel_size)) + (_region_map_size / 2);
 			bounds = int(uint(pos.x | pos.y) < uint(_region_map_size));
 			layer_index = (_region_map[ pos.y * _region_map_size + pos.x ] * bounds - 1);
 		}
 	}
 	return ivec3(ivec2(mod(r_uv,_region_size)), layer_index);
 }
 // Takes in descaled (world_space / region_size) world to region space XZ (UV2) coordinates, returns vec3 with:
 // XY: (0. to 1.) coordinates within a region
 // Z: layer index used for texturearrays, -1 if not in a region
 vec3 get_index_uv(const vec2 uv2) {
 	ivec2 pos = ivec2(floor(uv2)) + (_region_map_size / 2);
 	int bounds = int(uint(pos.x | pos.y) < uint(_region_map_size));
 	int layer_index = _region_map[ pos.y * _region_map_size + pos.x ] * bounds - 1;
 	return vec3(uv2 - _region_locations[layer_index], float(layer_index));
 }
 void vertex() {
 	// Get vertex of flat plane in world coordinates and set world UV
 	v_vertex = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
 	// Camera distance to vertex on flat plane
 	float v_vertex_xz_dist = length(v_vertex.xz - _camera_pos.xz);
 	// Geomorph vertex, set end and start for linear height interpolate
 	float scale = MODEL_MATRIX[0][0];
 	float vertex_lerp = smoothstep(0.55, 0.95, (v_vertex_xz_dist / scale - _mesh_size - 4.0) / (_mesh_size - 2.0));
 	vec2 v_fract = fract(VERTEX.xz * 0.5) * 2.0;
 	// For LOD0 morph from a regular grid to an alternating grid to align with LOD1+
 	vec2 shift = (scale < _vertex_spacing + 1e-6) ? // LOD0 or not
 		// Shift from regular to symetric
 		mix(v_fract, vec2(v_fract.x, -v_fract.y),
 			round(fract(round(mod(v_vertex.z * _vertex_density, 4.0)) *
 			round(mod(v_vertex.x * _vertex_density, 4.0)) * 0.25))
 			) :
 		// Symetric shift
 		v_fract * round((fract(v_vertex.xz * 0.25 / scale) - 0.5) * 4.0);
 	vec2 start_pos = v_vertex.xz * _vertex_density;
 	vec2 end_pos = (v_vertex.xz - shift * scale) * _vertex_density;
 	v_vertex.xz -= shift * scale * vertex_lerp;
 	// UV coordinates in world space. Values are 0 to _region_size within regions
 	UV = v_vertex.xz * _vertex_density;
 	// UV coordinates in region space + texel offset. Values are 0 to 1 within regions
 	UV2 = fma(UV, vec2(_region_texel_size), vec2(0.5 * _region_texel_size));
 	// Discard vertices for Holes. 1 lookup
 	ivec3 v_region = get_index_coord(start_pos, VERTEX_PASS);
 	uint control = floatBitsToUint(texelFetch(_control_maps, v_region, 0)).r;
 	bool hole = DECODE_HOLE(control);
 	// Show holes to all cameras except mouse camera (on exactly 1 layer)
 	if ( !(CAMERA_VISIBLE_LAYERS == _mouse_layer) &&
 			(hole || (_background_mode == 0u && v_region.z == -1))) {
 		v_vertex.x = 0. / 0.;
 	} else {
 		// Set final vertex height & calculate vertex normals. 3 lookups
 		ivec3 uv_a = get_index_coord(start_pos, VERTEX_PASS);
 		ivec3 uv_b = get_index_coord(end_pos, VERTEX_PASS);
 		float h = mix(texelFetch(_height_maps, uv_a, 0).r,texelFetch(_height_maps, uv_b, 0).r,vertex_lerp);
 		v_vertex.y = h;
 		// Vertex normals
 		float u = mix(texelFetch(_height_maps, get_index_coord(start_pos + vec2(1,0), VERTEX_PASS), 0).r,
 			texelFetch(_height_maps, get_index_coord(end_pos + vec2(1,0), VERTEX_PASS), 0).r, vertex_lerp);
 		float v = mix(texelFetch(_height_maps, get_index_coord(start_pos + vec2(0,1), VERTEX_PASS), 0).r,
 			texelFetch(_height_maps, get_index_coord(end_pos + vec2(0,1), VERTEX_PASS), 0).r, vertex_lerp);
 		v_normal = normalize(vec3(h - u, _vertex_spacing, h - v));
 	}
 	// Convert model space to view space w/ skip_vertex_transform render mode
 	VERTEX = (VIEW_MATRIX * vec4(v_vertex, 1.0)).xyz;
 	// Apply terrain normals
 	vec3 w_tangent = normalize(cross(v_normal, vec3(0.0, 0.0, 1.0)));
 	vec3 w_binormal = normalize(cross(v_normal, w_tangent));
 	TBN = mat3(w_tangent, w_binormal, v_normal);
 	NORMAL = normalize((VIEW_MATRIX * vec4(v_normal, 0.0)).xyz);
 	BINORMAL = normalize((VIEW_MATRIX * vec4(w_binormal, 0.0)).xyz);
 	TANGENT = normalize((VIEW_MATRIX * vec4(w_tangent, 0.0)).xyz);
 }
 ////////////////////////
 // Fragment
 ////////////////////////
 mat2 rotate_plane(float angle) {
 	float c = cos(angle), s = sin(angle);
 	return mat2(vec2(c, s), vec2(-s, c));
 }
 void fragment() {
 	// Recover UVs
 	vec2 uv = UV;
 	vec2 uv2 = UV2;
 	// Lookup offsets, ID and blend weight
 	vec3 region_uv = get_index_uv(uv2);
 	const vec3 offsets = vec3(0, 1, 2);
 	vec2 index_id = floor(uv);
 	vec2 weight = fract(uv);
 	vec2 invert = 1.0 - weight;
 	vec4 weights = vec4(
 		invert.x * weight.y, // 0
 		weight.x * weight.y, // 1
 		weight.x * invert.y, // 2
 		invert.x * invert.y  // 3
 	);
 	ivec3 index[4];
 	// control map lookups, used for some normal lookups as well
 	index[0] = get_index_coord(index_id + offsets.xy, FRAGMENT_PASS);
 	index[1] = get_index_coord(index_id + offsets.yy, FRAGMENT_PASS);
 	index[2] = get_index_coord(index_id + offsets.yx, FRAGMENT_PASS);
 	index[3] = get_index_coord(index_id + offsets.xx, FRAGMENT_PASS);
 	vec3 base_ddx = dFdxCoarse(v_vertex);
 	vec3 base_ddy = dFdyCoarse(v_vertex);
 	vec4 base_dd = vec4(base_ddx.xz, base_ddy.xz);
 	// Calculate the effective mipmap for regionspace
 	float region_mip = log2(max(length(base_ddx.xz), length(base_ddy.xz)) * _vertex_density);
 	// Color map
 	vec4 color_map = region_uv.z > -1.0 ? textureLod(_color_maps, region_uv, region_mip) : COLOR_MAP;
 	if (flat_terrain_normals) {
 		NORMAL = normalize(cross(dFdyCoarse(VERTEX),dFdxCoarse(VERTEX)));
 		TANGENT = normalize(cross(NORMAL, VIEW_MATRIX[2].xyz));
 		BINORMAL = normalize(cross(NORMAL, TANGENT));
 	}
 	// defaults
 	vec4 normal_rough = vec4(0., 1., 0., 0.7);
 	vec4 albedo_height = vec4(1.);
 	float normal_map_depth = 1.;
 	float ao_strength = 0.;
 	if (enable_texturing) {
 		// set to zero before accumulation
 		albedo_height = vec4(0.);
 		normal_rough = vec4(0.);
 		normal_map_depth = 0.;
 		ao_strength = 0.;
 		float total_weight = 0.;
 		float sharpness = fma(56., blend_sharpness, 8.);
 		// Get index control data
 		// 1 - 4 lookups
 		uvec4 control = floatBitsToUint(vec4(
 			texelFetch(_control_maps, index[0], 0).r,
 			texelFetch(_control_maps, index[1], 0).r,
 			texelFetch(_control_maps, index[2], 0).r,
 			texelFetch(_control_maps, index[3], 0).r));
 		{
 			// Auto blend calculation
 			float auto_blend = clamp(fma(auto_slope * 2.0, (v_normal.y - 1.0), 1.0)
 				- auto_height_reduction * 0.01 * v_vertex.y, 0.0, 1.0);
 			// Enable Autoshader if outside regions or painted in regions, otherwise manual painted
 			uvec4 is_auto = (control & uvec4(0x1u)) | uvec4(uint(region_uv.z < 0.0));
 			uint u_auto = 
 				((uint(auto_base_texture) & 0x1Fu) << 27u) |
 				((uint(auto_overlay_texture) & 0x1Fu) << 22u) |
 				((uint(fma(auto_blend, 255.0 , 0.5)) & 0xFFu) << 14u);
 			control = control * (1u - is_auto) + u_auto * is_auto;
 		}
 		// Texture weights
 		// Vectorised Deocode of all texture IDs, then swizzle to per index mapping.
 		ivec4 t_id[2] = {ivec4(control >> uvec4(27u) & uvec4(0x1Fu)),
 			ivec4(control >> uvec4(22u) & uvec4(0x1Fu))};
 		ivec2 texture_ids[4] = ivec2[4](
 			ivec2(t_id[0].x, t_id[1].x),
 			ivec2(t_id[0].y, t_id[1].y),
 			ivec2(t_id[0].z, t_id[1].z),
 			ivec2(t_id[0].w, t_id[1].w));
 		// interpolated weights.
 		vec4 weights_id_1 = vec4(control >> uvec4(14u) & uvec4(0xFFu)) * DIV_255 * weights;
 		vec4 weights_id_0 = weights - weights_id_1;
 		vec2 t_weights[4] = {vec2(0), vec2(0), vec2(0), vec2(0)};
 		for (int i = 0; i < 4; i++) {
 				vec2 w_0 = vec2(weights_id_0[i]);
 				vec2 w_1 = vec2(weights_id_1[i]);
 				ivec2 id_0 = texture_ids[i].xx;
 				ivec2 id_1 = texture_ids[i].yy;
 				t_weights[0] += fma(w_0, vec2(equal(texture_ids[0], id_0)), w_1 * vec2(equal(texture_ids[0], id_1)));
 				t_weights[1] += fma(w_0, vec2(equal(texture_ids[1], id_0)), w_1 * vec2(equal(texture_ids[1], id_1)));
 				t_weights[2] += fma(w_0, vec2(equal(texture_ids[2], id_0)), w_1 * vec2(equal(texture_ids[2], id_1)));
 				t_weights[3] += fma(w_0, vec2(equal(texture_ids[3], id_0)), w_1 * vec2(equal(texture_ids[3], id_1)));
 		}
 		// Process control data to determine each texture ID present, so that only
 		// a single sample will be needed later, as all id are contiguous when features
 		// like detiling, scale, rotation, and projection are not present.
 		// 2 to 16 lookups
 		uint id_read = 0u; // 1 bit per possible ID
 		// world normal adjustment requires acess to previous id during next iteration
 		vec4 nrm = vec4(0.0, 1.0, 0.0, 1.0);
 		// adjust uv scale to account for vertex spacing
 		uv *= _vertex_spacing;
 		for (int i = 0; i < 4; i++) {
 			for (int t = 0; t < 2; t++) {
 				int id = texture_ids[i][t];
 				uint mask = 1u << uint(id);
 				if ((id_read & mask) == 0u) {
 					// Set this id bit
 					id_read |= mask;
 					float id_w = t_weights[i][t];
 					float id_scale = _texture_uv_scale_array[id] * 0.5;
 					vec2 id_uv = fma(uv, vec2(id_scale), vec2(0.5));
 					vec4 i_dd = base_dd * id_scale;
 					vec4 alb = textureGrad(_texture_array_albedo, vec3(id_uv, float(id)), i_dd.xy, i_dd.zw);
 					float world_normal = clamp(fma(TBN[0], vec3(nrm.x), fma(TBN[1], vec3(nrm.z), v_normal * vec3(nrm.y))).y, 0., 1.);
 					nrm = textureGrad(_texture_array_normal, vec3(id_uv, float(id)), i_dd.xy, i_dd.zw);
 					alb.rgb *= _texture_color_array[id].rgb;
 					nrm.a = clamp(nrm.a + _texture_roughness_mod_array[id], 0., 1.);
 					// Unpack normal map for blending.
 					nrm.xyz = fma(nrm.xzy, vec3(2.0), vec3(-1.0));
 					// height weight modifier.
 					float id_weight = exp2(sharpness * log2(id_w + alb.a * world_normal));
 					albedo_height += alb * id_weight;
 					normal_rough += nrm * id_weight;
 					normal_map_depth += _texture_normal_depth_array[id] * id_weight;
 					ao_strength += _texture_ao_strength_array[id] * id_weight;
 					total_weight += id_weight;
 				}
 			}
 		}
 		// normalize accumulated values back to 0.0 - 1.0 range.
 		float weight_inv = 1.0 / total_weight;
 		albedo_height *= weight_inv;
 		normal_rough *= weight_inv;
 		normal_map_depth *= weight_inv;
 		ao_strength *= weight_inv;
 	}
 	// Macro variation. 2 lookups
 	vec3 macrov = vec3(1.);
 	if (enable_macro_variation) {
 		float noise1 = texture(noise_texture, (uv * noise1_scale * .1 + noise1_offset) * rotate_plane(noise1_angle)).r;
 		float noise2 = texture(noise_texture, uv * noise2_scale * .1).r;
 		macrov = mix(macro_variation1, vec3(1.), noise1);
 		macrov *= mix(macro_variation2, vec3(1.), noise2);
 		macrov = mix(vec3(1.0), macrov, clamp(v_normal.y + macro_variation_slope, 0., 1.));
 	}
 	// Wetness/roughness modifier, converting 0 - 1 range to -1 to 1 range, clamped to Godot roughness values 
 	float roughness = clamp(fma(color_map.a - 0.5, 2.0, normal_rough.a), 0., 1.);
 	// Apply PBR
 	ALBEDO = albedo_height.rgb * color_map.rgb * macrov;
 	ROUGHNESS = roughness;
 	SPECULAR = 1. - normal_rough.a;
 	// Repack final normal map value.
 	NORMAL_MAP = fma(normalize(normal_rough.xzy), vec3(0.5), vec3(0.5));
 	NORMAL_MAP_DEPTH = normal_map_depth;
 	// Higher and/or facing up, less occluded.
 	float ao = (1. - (albedo_height.a * log(2.1 - ao_strength))) * (1. - normal_rough.y);
 	AO = clamp(1. - ao * ao_strength, albedo_height.a, 1.0);
 	AO_LIGHT_AFFECT = (1.0 - albedo_height.a) * clamp(normal_rough.y, 0., 1.);
 }
@@ -0,0 +1 @@
 uid://bbx2xhanpq5l3
@@ -0,0 +1,217 @@
 // Copyright © 2023-2026 Cory Petkovsek, Roope Palmroos, and Contributors.
 // This shader is the minimum needed to allow the terrain to function, without any texturing.
 shader_type spatial;
 render_mode blend_mix,depth_draw_opaque,cull_back,diffuse_burley,specular_schlick_ggx,skip_vertex_transform;
 // Defined Constants
 #define SKIP_PASS 0
 #define VERTEX_PASS 1
 #define FRAGMENT_PASS 2
 #if CURRENT_RENDERER == RENDERER_COMPATIBILITY
    #define fma(a, b, c) ((a) * (b) + (c))
    #define dFdxCoarse(a) dFdx(a)
    #define dFdyCoarse(a) dFdy(a)
 #endif
 // Private uniforms
 // Commented uniforms aren't needed for this shader, but are available for your own needs.
 uniform vec3 _camera_pos = vec3(0.f);
 uniform float _mesh_size = 48.f;
 uniform uint _background_mode = 1u; // NONE = 0, FLAT = 1, NOISE = 2
 uniform uint _mouse_layer = 0x80000000u; // Layer 32
 uniform float _vertex_spacing = 1.0;
 uniform float _vertex_density = 1.0; // = 1/_vertex_spacing
 uniform float _region_size = 1024.0;
 uniform float _region_texel_size = 0.0009765625; // = 1/1024
 uniform int _region_map_size = 32;
 uniform int _region_map[1024];
 //uniform vec2 _region_locations[1024];
 //uniform float _texture_uv_scale_array[32];
 //uniform float _texture_detile_array[32];
 //uniform vec4 _texture_color_array[32];
 uniform highp sampler2DArray _height_maps : repeat_disable;
 uniform highp sampler2DArray _control_maps : repeat_disable;
 //uniform highp sampler2DArray _color_maps : source_color, filter_linear_mipmap_anisotropic, repeat_disable;
 //uniform highp sampler2DArray _texture_array_albedo : source_color, filter_linear_mipmap_anisotropic, repeat_enable;
 //uniform highp sampler2DArray _texture_array_normal : hint_normal, filter_linear_mipmap_anisotropic, repeat_enable;
 // Public Uniforms
 uniform bool flat_terrain_normals = false;
 // Varyings & Types
 // Some are required for editor functions
 varying float v_vertex_xz_dist;
 varying vec3 v_vertex;
 ////////////////////////
 // Vertex
 ////////////////////////
 // Takes in world space XZ (UV) coordinates & search depth (only applicable for background mode none)
 // Returns ivec3 with:
 // XY: (0 to _region_size - 1) coordinates within a region
 // Z: layer index used for texturearrays, -1 if not in a region
 ivec3 get_index_coord(const vec2 uv, const int search) {
 	vec2 r_uv = round(uv);
 	vec2 o_uv = mod(r_uv,_region_size);
 	ivec2 pos;
 	int bounds, layer_index = -1;
 	for (int i = -1; i < clamp(search, SKIP_PASS, FRAGMENT_PASS); i++) {
 		if ((layer_index == -1 && _background_mode == 0u ) || i < 0) {
 			r_uv -= i == -1 ? vec2(0.0) : vec2(float(o_uv.x <= o_uv.y), float(o_uv.y <= o_uv.x));
 			pos = ivec2(floor((r_uv) * _region_texel_size)) + (_region_map_size / 2);
 			bounds = int(uint(pos.x | pos.y) < uint(_region_map_size));
 			layer_index = (_region_map[ pos.y * _region_map_size + pos.x ] * bounds - 1);
 		}
 	}
 	return ivec3(ivec2(mod(r_uv,_region_size)), layer_index);
 }
 void vertex() {
 	// Get vertex of flat plane in world coordinates and set world UV
 	v_vertex = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
 	// Camera distance to vertex on flat plane
 	v_vertex_xz_dist = length(v_vertex.xz - _camera_pos.xz);
 	// Geomorph vertex, set end and start for linear height interpolate
 	float scale = MODEL_MATRIX[0][0];
 	float vertex_lerp = smoothstep(0.55, 0.95, (v_vertex_xz_dist / scale - _mesh_size - 4.0) / (_mesh_size - 2.0));
 	vec2 v_fract = fract(VERTEX.xz * 0.5) * 2.0;
 	// For LOD0 morph from a regular grid to an alternating grid to align with LOD1+
 	vec2 shift = (scale < _vertex_spacing + 1e-6) ? // LOD0 or not
 		// Shift from regular to symetric
 		mix(v_fract, vec2(v_fract.x, -v_fract.y),
 			round(fract(round(mod(v_vertex.z * _vertex_density, 4.0)) *
 			round(mod(v_vertex.x * _vertex_density, 4.0)) * 0.25))
 			) :
 		// Symetric shift
 		v_fract * round((fract(v_vertex.xz * 0.25 / scale) - 0.5) * 4.0);
 	vec2 start_pos = v_vertex.xz * _vertex_density;
 	vec2 end_pos = (v_vertex.xz - shift * scale) * _vertex_density;
 	v_vertex.xz -= shift * scale * vertex_lerp;
 	// UV coordinates in world space. Values are 0 to _region_size within regions
 	UV = v_vertex.xz * _vertex_density;
 	// UV coordinates in region space + texel offset. Values are 0 to 1 within regions
 	UV2 = fma(UV, vec2(_region_texel_size), vec2(0.5 * _region_texel_size));
 	// Discard vertices for Holes. 1 lookup
 	ivec3 v_region = get_index_coord(start_pos, VERTEX_PASS);
 	uint control = floatBitsToUint(texelFetch(_control_maps, v_region, 0)).r;
 	bool hole = bool(control >>2u & 0x1u);
 	// Show holes to all cameras except mouse camera (on exactly 1 layer)
 	if ( !(CAMERA_VISIBLE_LAYERS == _mouse_layer) &&
 			(hole || (_background_mode == 0u && v_region.z < 0))) {
 		v_vertex.x = 0. / 0.;
 	} else {
 		// Interpolate Geomorph Start & End, set height. 2 Lookups.
 		ivec3 uv_a = get_index_coord(start_pos, VERTEX_PASS);
 		ivec3 uv_b = get_index_coord(end_pos, VERTEX_PASS);
 		float h = mix(texelFetch(_height_maps, uv_a, 0).r, texelFetch(_height_maps, uv_b, 0).r, vertex_lerp);
 		v_vertex.y = h;
 	}
 	// Convert model space to view space w/ skip_vertex_transform render mode
 	VERTEX = (VIEW_MATRIX * vec4(v_vertex, 1.0)).xyz;
 	NORMAL = normalize((MODELVIEW_MATRIX * vec4(NORMAL, 0.0)).xyz);
 	BINORMAL = normalize((MODELVIEW_MATRIX * vec4(BINORMAL, 0.0)).xyz);
 	TANGENT = normalize((MODELVIEW_MATRIX * vec4(TANGENT, 0.0)).xyz);
 }
 ////////////////////////
 // Fragment
 ////////////////////////
 void fragment() {
 	// Recover UVs
 	vec2 uv = UV;
 	//vec2 uv2 = UV2;
 	// Lookup offsets, ID and blend weight
 	const vec3 offsets = vec3(0, 1, 2);
 	vec2 index_id = floor(uv);
 	vec2 weight = fract(uv);
 	vec2 invert = 1.0 - weight;
 	vec4 weights = vec4(
 		invert.x * weight.y, // 0
 		weight.x * weight.y, // 1
 		weight.x * invert.y, // 2
 		invert.x * invert.y  // 3
 	);
 	vec3 base_ddx = dFdxCoarse(v_vertex);
 	vec3 base_ddy = dFdyCoarse(v_vertex);
 	//vec4 base_derivatives = vec4(base_ddx.xz, base_ddy.xz);
 	// Calculate the effective mipmap for regionspace, and if less than 0,
 	// skip all extra lookups required for bilinear blend.
 	float region_mip = log2(max(length(base_ddx.xz), length(base_ddy.xz)) * _vertex_density);
 	bool bilerp = region_mip < 0.0;
 	ivec3 index[4];
 	// control map lookups, used for some normal lookups as well
 	index[0] = get_index_coord(index_id + offsets.xy, FRAGMENT_PASS);
 	index[1] = get_index_coord(index_id + offsets.yy, FRAGMENT_PASS);
 	index[2] = get_index_coord(index_id + offsets.yx, FRAGMENT_PASS);
 	index[3] = get_index_coord(index_id + offsets.xx, FRAGMENT_PASS);
 	// Terrain normals
 	vec3 index_normal[4];
 	float h[4];
 	// allows additional derivatives, eg world noise, brush previews etc
 	float u = 0.0;
 	float v = 0.0;
 	// Re-use index[] for the first lookups, skipping some math. 3 lookups
 	h[3] = texelFetch(_height_maps, index[3], 0).r; // 0 (0,0)
 	h[2] = texelFetch(_height_maps, index[2], 0).r; // 1 (1,0)
 	h[0] = texelFetch(_height_maps, index[0], 0).r; // 2 (0,1)
 	index_normal[3] = normalize(vec3(h[3] - h[2] + u, _vertex_spacing, h[3] - h[0] + v));
 	// Set flat world normal - overriden if bilerp is true
 	vec3 w_normal = index_normal[3];
 	// Branching smooth normals must be done seperatley for correct normals at all 4 index ids
 	if (bilerp) {
 		// 5 lookups
 		// Fetch the additional required height values for smooth normals
 		h[1] = texelFetch(_height_maps, index[1], 0).r; // 3 (1,1)
 		float h_4 = texelFetch(_height_maps, get_index_coord(index_id + offsets.yz, FRAGMENT_PASS), 0).r; // 4 (1,2)
 		float h_5 = texelFetch(_height_maps, get_index_coord(index_id + offsets.zy, FRAGMENT_PASS), 0).r; // 5 (2,1)
 		float h_6 = texelFetch(_height_maps, get_index_coord(index_id + offsets.zx, FRAGMENT_PASS), 0).r; // 6 (2,0)
 		float h_7 = texelFetch(_height_maps, get_index_coord(index_id + offsets.xz, FRAGMENT_PASS), 0).r; // 7 (0,2)
 		// Calculate the normal for the remaining index ids.
 		index_normal[0] = normalize(vec3(h[0] - h[1] + u, _vertex_spacing, h[0] - h_7 + v));
 		index_normal[1] = normalize(vec3(h[1] - h_5 + u, _vertex_spacing, h[1] - h_4 + v));
 		index_normal[2] = normalize(vec3(h[2] - h_6 + u, _vertex_spacing, h[2] - h[1] + v));
 		// Set interpolated world normal
 		w_normal =
 			index_normal[0] * weights[0] +
 			index_normal[1] * weights[1] +
 			index_normal[2] * weights[2] +
 			index_normal[3] * weights[3] ;
 	}
 	// Apply terrain normals
 	vec3 w_tangent = normalize(cross(w_normal, vec3(0.0, 0.0, 1.0)));
 	vec3 w_binormal = normalize(cross(w_normal, w_tangent));
 	NORMAL = mat3(VIEW_MATRIX) * w_normal;
 	TANGENT = mat3(VIEW_MATRIX) * w_tangent;
 	BINORMAL = mat3(VIEW_MATRIX) * w_binormal;
 	if (flat_terrain_normals) {
 		NORMAL = normalize(cross(dFdyCoarse(VERTEX),dFdxCoarse(VERTEX)));
 		TANGENT = normalize(cross(NORMAL, VIEW_MATRIX[2].xyz));
 		BINORMAL = normalize(cross(NORMAL, TANGENT));
 	}
 	// Apply PBR
 	ALBEDO = vec3(.2);
 	ROUGHNESS = .7;
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--- a/Show More
+++ b/Show More