feat(art): add storybook meadow and woodland villagers

world/jajce/materials/wind.gdshader

@@ -10,8 +10,10 @@ uniform float flutter_strength : hint_range(0.0, 0.05) = 0.012;
 uniform float wind_phase : hint_range(0.0, 6.2832) = 0.0;
 uniform vec3 albedo : source_color = vec3(0.19, 0.38, 0.17);
 uniform float roughness : hint_range(0.0, 1.0) = 0.9;
+varying vec3 paint_position;
 
 void vertex() {
+	paint_position = VERTEX;
 	float half_height = 1.2;
 	float height_factor = clamp((VERTEX.y + half_height) / (half_height * 2.0), 0.0, 1.0);
 	height_factor = height_factor * height_factor;
@@ -29,6 +31,17 @@ void vertex() {
 }
 
 void fragment() {
-	ALBEDO = albedo;
+	float patches = sin(paint_position.x * 6.0 + sin(paint_position.z * 7.0)) * sin(paint_position.y * 5.0);
+	float top = smoothstep(-0.65, 0.8, paint_position.y);
+	ALBEDO = albedo * mix(0.85, 1.17, top) * (1.0 + smoothstep(0.2, 0.4, patches) * 0.10);
 	ROUGHNESS = roughness;
+	SPECULAR = 0.0;
+}
+
+void light() {
+	float band = smoothstep(0.08, 0.18, dot(NORMAL, LIGHT));
+	float highlight = smoothstep(0.62, 0.74, dot(NORMAL, LIGHT));
+	vec3 tone = mix(vec3(0.32, 0.48, 0.39), vec3(0.87, 0.92, 0.72), band);
+	tone = mix(tone, vec3(1.12, 1.08, 0.82), highlight);
+	DIFFUSE_LIGHT += tone * ATTENUATION * LIGHT_COLOR / PI;
 }