diff --git a/player/npc/NpcVisual.gd b/player/npc/NpcVisual.gd
index 1c4dafc..6f2ddd8 100644
--- a/player/npc/NpcVisual.gd
+++ b/player/npc/NpcVisual.gd
@@ -185,8 +185,7 @@ func _physics_process(delta: float) -> void:
 		return
 
 	var next_pos := current_path[path_index]
-	var flat_next_pos := Vector3(next_pos.x, global_position.y, next_pos.z)
-	var to_next := flat_next_pos - global_position
+	var to_next := next_pos - global_position
 
 	if to_next.length() <= waypoint_reached_distance:
 		path_index += 1
@@ -197,7 +196,10 @@ func _physics_process(delta: float) -> void:
 
 	velocity.x = direction.x * move_speed
 	velocity.z = direction.z * move_speed
-	velocity.y = 0.0
+	if not is_on_floor():
+		velocity.y -= 30.0 * delta
+	else:
+		velocity.y = 0.0
 
 	move_and_slide()
 	if not global_position.is_equal_approx(prev_pos):
diff --git a/world/jajce/JajceWorld.tscn b/world/jajce/JajceWorld.tscn
index 3ffaecd..f0f899e 100644
--- a/world/jajce/JajceWorld.tscn
+++ b/world/jajce/JajceWorld.tscn
@@ -121,6 +121,8 @@ script = ExtResource("3_world")
 navigation_mesh = SubResource("NavigationMesh_greybox")
 
 [node name="GreyboxGround" type="StaticBody3D" parent="NavigationRegion3D"]
+collision_layer = 0
+collision_mask = 0
 
 [node name="Mesh" type="MeshInstance3D" parent="NavigationRegion3D/GreyboxGround"]
 visible = false
@@ -136,7 +138,7 @@ data_directory = "res://terrain/jajce/data"
 material = SubResource("Terrain3DMaterial_jajce")
 assets = ExtResource("1_assets")
 collision_mask = 3
-collision_mode = 0
+collision_mode = 1
 top_level = true
 
 [node name="FortressBlockout" type="Node3D" parent="."]