Added default terrain shader

src/game/game.tscn

@@ -184,7 +184,6 @@ script = ExtResource("3_rmm5i")
 
 [node name="Viewport" type="SubViewport" parent="RootControl/Rumbler/ViewportContainer"]
 handle_input_locally = false
-msaa_2d = 3
 msaa_3d = 3
 screen_space_aa = 1
 use_taa = true

src/shaders/terrain.tres

@@ -0,0 +1,547 @@
+[gd_resource type="Shader" format=3 uid="uid://dcbswuorsomae"]
+
+[resource]
+code = "shader_type spatial;
+render_mode blend_mix,depth_draw_opaque,cull_back,diffuse_burley,specular_schlick_ggx,skip_vertex_transform;
+
+/* This shader is generated based upon the debug views you have selected.
+ * The terrain function depends on this shader. So don't change:
+ * - vertex positioning in vertex()
+ * - terrain normal calculation in fragment()
+ * - the last function being fragment() as the editor injects code before the closing }
+ *
+ * Most will only want to customize the material calculation and PBR application in fragment()
+ *
+ * Uniforms that begin with _ are private and will not display in the inspector. However,
+ * you can set them via code. You are welcome to create more of your own hidden uniforms.
+ *
+ * This system only supports albedo, height, normal, roughness. Most textures don't need the other
+ * PBR channels. Height can be used as an approximation for AO. For the rare textures do need
+ * additional channels, you can add maps for that one texture. e.g. an emissive map for lava.
+ *
+ */
+
+// Private uniforms
+
+uniform float _region_size = 1024.0;
+uniform float _region_texel_size = 0.0009765625; // = 1/1024
+uniform float _vertex_spacing = 1.0;
+uniform float _vertex_density = 1.0; // = 1/_vertex_spacing
+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 usampler2DArray _control_maps : repeat_disable;
+uniform highp sampler2DArray _color_maps : source_color, filter_nearest_mipmap_anisotropic, repeat_disable;
+uniform highp sampler2DArray _texture_array_albedo : source_color, filter_nearest_mipmap_anisotropic, repeat_enable;
+uniform highp sampler2DArray _texture_array_normal : hint_normal, filter_nearest_mipmap_anisotropic, repeat_enable;
+uniform highp sampler2D noise_texture : source_color, filter_nearest_mipmap_anisotropic, repeat_enable;
+
+uniform float _texture_uv_scale_array[32];
+uniform float _texture_detile_array[32];
+uniform vec4 _texture_color_array[32];
+uniform uint _background_mode = 1u;  // NONE = 0, FLAT = 1, NOISE = 2
+uniform uint _mouse_layer = 0x80000000u; // Layer 32
+
+// Public uniforms
+uniform float vertex_normals_distance : hint_range(0, 1024) = 128.0;
+uniform bool height_blending = true;
+uniform float blend_sharpness : hint_range(0, 1) = 0.87;
+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;
+
+uniform vec3 macro_variation1 : source_color = vec3(1.);
+uniform vec3 macro_variation2 : source_color = vec3(1.);
+
+// Generic noise at 3 scales, which can be used for anything
+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
+uniform float noise3_scale : hint_range(0.001, 1.) = 0.225;  // Used for texture blending edge.
+
+// Varyings & Types
+
+struct Material {
+	vec4 alb_ht;
+	vec4 nrm_rg;
+	int base;
+	int over;
+	float blend;
+};
+
+varying flat vec3 v_vertex;	// World coordinate vertex location
+varying flat vec3 v_camera_pos;
+varying float v_vertex_xz_dist;
+varying flat ivec3 v_region;
+varying flat vec2 v_uv_offset;
+varying flat vec2 v_uv2_offset;
+varying vec3 v_normal;
+varying float v_region_border_mask;
+
+////////////////////////
+// Vertex
+////////////////////////
+
+// Takes in UV world space coordinates, returns ivec3 with:
+// XY: (0 to _region_size) coordinates within a region
+// Z: layer index used for texturearrays, -1 if not in a region
+ivec3 get_region_uv(const vec2 uv) {
+	ivec2 pos = ivec2(floor(uv * _region_texel_size)) + (_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 ivec3(ivec2(mod(uv,_region_size)), layer_index);
+}
+
+// Takes in UV2 region space 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_region_uv2(const vec2 uv2) {
+	// Remove Texel Offset to ensure correct region index.
+	ivec2 pos = ivec2(floor(uv2 - vec2(_region_texel_size * 0.5))) + (_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));
+}
+
+// World Noise
+uniform float world_noise_region_blend : hint_range(0.05, 0.95, 0.01) = 0.33;
+uniform int world_noise_max_octaves : hint_range(0, 15) = 4;
+uniform int world_noise_min_octaves : hint_range(0, 15) = 2;
+uniform float world_noise_lod_distance : hint_range(0, 40000, 1) = 7500.;
+uniform float world_noise_scale : hint_range(0.25, 20, 0.01) = 5.0;
+uniform float world_noise_height : hint_range(0, 1000, 0.1) = 64.0;
+uniform vec3 world_noise_offset = vec3(0.0);
+
+// Takes in UV2 region space coordinates, returns 1.0 or 0.0 if a region is present or not.
+float check_region(const vec2 uv2) {
+	ivec2 pos = ivec2(floor(uv2)) + (_region_map_size / 2);
+	int layer_index = 0;
+	if (uint(pos.x | pos.y) < uint(_region_map_size)) {
+		layer_index = clamp(_region_map[ pos.y * _region_map_size + pos.x ] - 1, -1, 0) + 1;
+	}
+	return float(layer_index);
+}
+
+// Takes in UV2 region space coordinates, returns a blend value (0 - 1 range) between empty, and valid regions
+float region_blend(vec2 uv2) {
+	uv2 -= 0.5;
+	const vec2 offset = vec2(0.0,1.0);
+	float a = check_region(uv2 + offset.xy);
+	float b = check_region(uv2 + offset.yy);
+	float c = check_region(uv2 + offset.yx);
+	float d = check_region(uv2 + offset.xx);
+	vec2 w = smoothstep(vec2(0.0), vec2(1.0), fract(uv2));
+	float blend = mix(mix(d, c, w.x), mix(a, b, w.x), w.y);
+    return 1.0 - blend;
+}
+
+float hashf(float f) {
+	return fract(sin(f) * 1e4);
+}
+
+float hashv2(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)))));
+}
+
+// https://iquilezles.org/articles/morenoise/
+vec3 noise2D(vec2 x) {
+    vec2 f = fract(x);
+    // Quintic Hermine Curve.  Similar to SmoothStep()
+    vec2 u = f*f*f*(f*(f*6.0-15.0)+10.0);
+    vec2 du = 30.0*f*f*(f*(f-2.0)+1.0);
+
+    vec2 p = floor(x);
+
+	// Four corners in 2D of a tile
+	float a = hashv2( p+vec2(0,0) );
+    float b = hashv2( p+vec2(1,0) );
+    float c = hashv2( p+vec2(0,1) );
+    float d = hashv2( p+vec2(1,1) );
+
+    // Mix 4 corner percentages
+    float k0 =   a;
+    float k1 =   b - a;
+    float k2 =   c - a;
+    float k3 =   a - b - c + d;
+    return vec3( k0 + k1 * u.x + k2 * u.y + k3 * u.x * u.y,
+                du * ( vec2(k1, k2) + k3 * u.yx) );
+}
+
+float world_noise(vec2 p) {
+    float a = 0.0;
+    float b = 1.0;
+    vec2  d = vec2(0.0);
+
+    int octaves = int( clamp(
+	float(world_noise_max_octaves) - floor(v_vertex_xz_dist/(world_noise_lod_distance)),
+    float(world_noise_min_octaves), float(world_noise_max_octaves)) );
+
+    for( int i=0; i < octaves; i++ ) {
+        vec3 n = noise2D(p);
+        d += n.yz;
+        a += b * n.x / (1.0 + dot(d,d));
+        b *= 0.5;
+        p = mat2( vec2(0.8, -0.6), vec2(0.6, 0.8) ) * p * 2.0;
+    }
+    return a;
+}
+
+float get_noise_height(const vec2 uv) {
+	float weight = region_blend(uv);
+	// only calculate world noise when it could be visibile.
+	if (weight <= 1.0 - world_noise_region_blend) {
+		return 0.0;
+	}
+	//TODO: Offset/scale UVs are semi-dependent upon region size 1024. Base on v_vertex.xz instead
+	float noise = world_noise((uv + world_noise_offset.xz * 1024. / _region_size) * world_noise_scale * _region_size / 1024. * .1) *
+            world_noise_height * 10. + world_noise_offset.y * 100.;
+	weight = smoothstep(1.0 - world_noise_region_blend, 1.0, weight);
+	return mix(0.0, noise, weight);
+}
+
+// World Noise end
+
+// 1 lookup
+float get_height(vec2 uv) {
+	highp float height = 0.0;
+	vec3 region = get_region_uv2(uv);
+	if (region.z >= 0.) {
+		height = texture(_height_maps, region).r;
+	}
+	// World Noise
+   	if (_background_mode == 2u) {
+	    height += get_noise_height(uv);
+    }
+ 	return height;
+}
+
+void vertex() {
+	// Get camera pos in world vertex coords
+	v_camera_pos = INV_VIEW_MATRIX[3].xyz;
+
+	// 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 - v_camera_pos.xz);
+
+	// UV coordinates in world space. Values are 0 to _region_size within regions
+	UV = round(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
+	v_region = get_region_uv(UV);
+	uint control = 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 && (get_region_uv(UV - _region_texel_size) & v_region).z < 0))) {
+		VERTEX.x = 0. / 0.;
+	} else {
+		// Set final vertex height & calculate vertex normals. 3 lookups.
+		VERTEX.y = get_height(UV2);
+		v_vertex.y = VERTEX.y;
+		v_normal = vec3(
+			v_vertex.y - get_height(UV2 + vec2(_region_texel_size, 0)),
+			_vertex_spacing,
+			v_vertex.y - get_height(UV2 + vec2(0, _region_texel_size))
+		);
+		// Due to a bug caused by the GPUs linear interpolation across edges of region maps,
+		// mask region edges and use vertex normals only across region boundaries.
+		v_region_border_mask = mod(UV.x + 2.5, _region_size) - fract(UV.x) < 5.0 || mod(UV.y + 2.5, _region_size) - fract(UV.y) < 5.0 ? 1. : 0.;
+	}
+
+	// Transform UVs to local to avoid poor precision during varying interpolation.
+	v_uv_offset = MODEL_MATRIX[3].xz * _vertex_density;
+	UV -= v_uv_offset;
+	v_uv2_offset = v_uv_offset * _region_texel_size;
+	UV2 -= v_uv2_offset;
+
+	// Convert model space to view space w/ skip_vertex_transform render mode
+	VERTEX = (MODEL_MATRIX * vec4(VERTEX, 1.0)).xyz;
+	VERTEX = (VIEW_MATRIX * vec4(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
+////////////////////////
+
+// 0 - 3 lookups
+vec3 get_normal(vec2 uv, out vec3 tangent, out vec3 binormal) {
+	float u, v, height;
+	vec3 normal;
+	// Use vertex normals within radius of vertex_normals_distance, and along region borders.
+	if ((v_region_border_mask > 0.5 || v_vertex_xz_dist < vertex_normals_distance) && v_region.z >= 0) {
+		normal = normalize(v_normal);
+	} else {
+		height = get_height(uv);
+		u = height - get_height(uv + vec2(_region_texel_size, 0));
+		v = height - get_height(uv + vec2(0, _region_texel_size));
+		normal = normalize(vec3(u, _vertex_spacing, v));
+	}
+	tangent = normalize(cross(normal, vec3(0, 0, 1)));
+	binormal = normalize(cross(normal, tangent));
+	return normal;
+}
+
+vec3 unpack_normal(vec4 rgba) {
+	vec3 n = fma(rgba.xzy, vec3(2.0, 2.0, -2.0), vec3(-1.0, -1.0, 1.0));
+	return n;
+}
+
+vec4 pack_normal(vec3 n, float a) {
+	return vec4(fma(n.xzy, vec3(0.5, -0.5, 0.5), vec3(0.5)), a);
+}
+
+float random(in vec2 xy) {
+	return fract(sin(dot(xy, vec2(12.9898, 78.233))) * 43758.5453);
+}
+
+vec2 rotate(vec2 v, float cosa, float sina) {
+	return vec2(fma(cosa, v.x, - sina * v.y), fma(sina, v.x, cosa * v.y));
+}
+
+// Moves a point around a pivot point.
+vec2 rotate_around(vec2 point, vec2 pivot, float angle){
+	float x = pivot.x + (point.x - pivot.x) * cos(angle) - (point.y - pivot.y) * sin(angle);
+	float y = pivot.y + (point.x - pivot.x) * sin(angle) + (point.y - pivot.y) * cos(angle);
+	return vec2(x, y);
+}
+
+vec4 height_blend(vec4 a_value, float a_height, vec4 b_value, float b_height, float blend) {
+	if(height_blending) {
+		float ma = max(a_height + (1.0 - blend), b_height + blend) - (1.001 - blend_sharpness);
+	    float b1 = max(a_height + (1.0 - blend) - ma, 0.0);
+	    float b2 = max(b_height + blend - ma, 0.0);
+	    return (a_value * b1 + b_value * b2) / (b1 + b2);
+	} else {
+		float contrast = 1.0 - blend_sharpness;
+		float factor = (blend - contrast) / contrast;
+		return mix(a_value, b_value, clamp(factor, 0.0, 1.0));
+	}
+}
+
+vec2 detiling(vec2 uv, vec2 uv_center, int mat_id, inout float normal_rotation){
+	if (_texture_detile_array[mat_id] >= 0.001){
+		uv_center = floor(uv_center) + 0.5;
+		float detile = fma(random(uv_center), 2.0, -1.0) * TAU * _texture_detile_array[mat_id]; // -180deg to 180deg
+		uv = rotate_around(uv, uv_center, detile);
+		// Accumulate total rotation for normal rotation
+		normal_rotation += detile;
+	}
+	return uv;
+}
+
+vec2 rotate_normal(vec2 normal, float angle) {
+	angle = fma(PI, 0.5, angle);
+	float new_y = dot(vec2(cos(angle), sin(angle)), normal);
+	angle = fma(PI, -0.5, angle);
+	float new_x = dot(vec2(cos(angle) ,sin(angle)) ,normal);
+	return vec2(new_x, new_y);
+}
+
+// 2-4 lookups
+void get_material(vec2 base_uv, uint control, ivec3 iuv_center, vec3 normal, out Material out_mat) {
+	out_mat = Material(vec4(0.), vec4(0.), 0, 0, 0.0);
+	vec2 uv_center = vec2(iuv_center.xy);
+	int region = iuv_center.z;
+
+	// Enable Autoshader if outside regions or painted in regions, otherwise manual painted
+	bool auto_shader = region < 0 || bool(control & 0x1u);
+	out_mat.base = int(auto_shader) * auto_base_texture + int(!auto_shader) * int(control >>27u & 0x1Fu);
+	out_mat.over = int(auto_shader) * auto_overlay_texture + int(!auto_shader) * int(control >> 22u & 0x1Fu);
+	out_mat.blend = float(auto_shader) * clamp(
+			dot(vec3(0., 1., 0.), normal * auto_slope * 2. - (auto_slope * 2. - 1.))
+			- auto_height_reduction * .01 * v_vertex.y // Reduce as vertices get higher
+			, 0., 1.) +
+			 float(!auto_shader) * float(control >>14u & 0xFFu) * 0.003921568627450; // 1./255.0
+
+	// Control map scale & rotation, apply to both base and
+	// uv_center. Translate uv center to the current region.
+	uv_center += _region_locations[region] * _region_size;
+	// Define base scale from control map value as array index. 0.5 as baseline.
+	float[8] scale_array = { 0.5, 0.4, 0.3, 0.2, 0.1, 0.8, 0.7, 0.6};
+	float control_scale = scale_array[(control >>7u & 0x7u)];
+	base_uv *= control_scale;
+	uv_center *=  control_scale;
+	// calculate baseline derivatives
+	vec2 ddx = dFdxCoarse(base_uv);
+	vec2 ddy = dFdyCoarse(base_uv);
+	// Apply global uv rotation from control map.
+	float uv_rotation = float(control >>10u & 0xFu) / 16. * TAU;
+	base_uv = rotate_around(base_uv, vec2(0), uv_rotation);
+	uv_center = rotate_around(uv_center, vec2(0), uv_rotation);
+
+	vec2 matUV = base_uv;
+	vec4 albedo_ht = vec4(0.);
+	vec4 normal_rg = vec4(0.5f, 0.5f, 1.0f, 1.0f);
+	vec4 albedo_far = vec4(0.);
+	vec4 normal_far = vec4(0.5f, 0.5f, 1.0f, 1.0f);
+	float mat_scale = _texture_uv_scale_array[out_mat.base];
+	float normal_angle = uv_rotation;
+	vec2 ddx1 = ddx;
+	vec2 ddy1 = ddy;
+
+	matUV = detiling(base_uv * mat_scale, uv_center * mat_scale, out_mat.base, normal_angle);
+	ddx1 *= mat_scale;
+	ddy1 *= mat_scale;
+	albedo_ht = textureGrad(_texture_array_albedo, vec3(matUV, float(out_mat.base)), ddx1, ddy1);
+	normal_rg = textureGrad(_texture_array_normal, vec3(matUV, float(out_mat.base)), ddx1, ddy1);
+
+	// Unpack & rotate base normal for blending
+	normal_rg.xz = unpack_normal(normal_rg).xz;
+	normal_rg.xz = rotate_normal(normal_rg.xz, normal_angle);
+
+	// Apply color to base
+	albedo_ht.rgb *= _texture_color_array[out_mat.base].rgb;
+
+	// Setup overlay texture to blend
+	float mat_scale2 = _texture_uv_scale_array[out_mat.over];
+	float normal_angle2 = uv_rotation;
+	vec2 matUV2 = detiling(base_uv * mat_scale2, uv_center * mat_scale2, out_mat.over, normal_angle2);
+	vec2 ddx2 = ddx * mat_scale2;
+	vec2 ddy2 = ddy * mat_scale2;
+	vec4 albedo_ht2 = textureGrad(_texture_array_albedo, vec3(matUV2, float(out_mat.over)), ddx2, ddy2);
+	vec4 normal_rg2 = textureGrad(_texture_array_normal, vec3(matUV2, float(out_mat.over)), ddx2, ddy2);
+
+	// Though it would seem having the above lookups in this block, or removing the branch would
+	// be more optimal, the first introduces artifacts #276, and the second is noticably slower.
+	// It seems the branching off dual scaling and the color array lookup is more optimal.
+	if (out_mat.blend > 0.f) {
+		// Unpack & rotate overlay normal for blending
+		normal_rg2.xz = unpack_normal(normal_rg2).xz;
+		normal_rg2.xz = rotate_normal(normal_rg2.xz, normal_angle2);
+
+		// Apply color to overlay
+		albedo_ht2.rgb *= _texture_color_array[out_mat.over].rgb;
+
+		// Blend overlay and base
+		albedo_ht = height_blend(albedo_ht, albedo_ht.a, albedo_ht2, albedo_ht2.a, out_mat.blend);
+		normal_rg = height_blend(normal_rg, albedo_ht.a, normal_rg2, albedo_ht2.a, out_mat.blend);
+	}
+
+	// Repack normals and return material
+	normal_rg = pack_normal(normal_rg.xyz, normal_rg.a);
+	out_mat.alb_ht = albedo_ht;
+	out_mat.nrm_rg = normal_rg;
+	return;
+}
+
+float blend_weights(float weight, float detail) {
+	weight = smoothstep(0.0, 1.0, weight);
+	weight = sqrt(weight * 0.5);
+	float result = max(0.1 * weight, fma(10.0, (weight + detail), 1.0f - (detail + 10.0)));
+	return result;
+}
+
+void fragment() {
+	// Recover UVs
+	vec2 uv = UV + v_uv_offset;
+	vec2 uv2 = UV2 + v_uv2_offset;
+
+	// Calculate Terrain Normals. 4 lookups
+	vec3 w_tangent, w_binormal;
+	vec3 w_normal = get_normal(uv2, w_tangent, w_binormal);
+	NORMAL = mat3(VIEW_MATRIX) * w_normal;
+	TANGENT = mat3(VIEW_MATRIX) * w_tangent;
+	BINORMAL = mat3(VIEW_MATRIX) * w_binormal;
+
+	// Idenfity 4 vertices surrounding this pixel
+	vec2 texel_pos = uv;
+	highp vec2 texel_pos_floor = floor(uv);
+
+	// Create a cross hatch grid of alternating 0/1 horizontal and vertical stripes 1 unit wide in XY
+	vec4 mirror = vec4(fract(texel_pos_floor * 0.5) * 2.0, 1.0, 1.0);
+	// And the opposite grid in ZW
+	mirror.zw = vec2(1.0) - mirror.xy;
+
+	// Get the region and control map ID for the vertices
+	ivec3 indexUV[4] = {
+		get_region_uv(texel_pos_floor + mirror.xy),
+		get_region_uv(texel_pos_floor + mirror.xw),
+		get_region_uv(texel_pos_floor + mirror.zy),
+		get_region_uv(texel_pos_floor + mirror.zw)
+	};
+
+	// Lookup adjacent vertices. 4 lookups
+	uint control[4] = {
+		texelFetch(_control_maps, indexUV[0], 0).r,
+		texelFetch(_control_maps, indexUV[1], 0).r,
+		texelFetch(_control_maps, indexUV[2], 0).r,
+		texelFetch(_control_maps, indexUV[3], 0).r
+	};
+
+	// Get the textures for each vertex. 8-16 lookups (2-4 ea)
+	Material mat[4];
+	get_material(uv, control[0], indexUV[0], w_normal, mat[0]);
+	get_material(uv, control[1], indexUV[1], w_normal, mat[1]);
+	get_material(uv, control[2], indexUV[2], w_normal, mat[2]);
+	get_material(uv, control[3], indexUV[3], w_normal, mat[3]);
+
+	// Calculate weight for the pixel position between the vertices
+	// Bilinear interpolation of difference of uv and floor(uv)
+	vec2 weights1 = clamp(texel_pos - texel_pos_floor, 0, 1);
+	weights1 = mix(weights1, vec2(1.0) - weights1, mirror.xy);
+	vec2 weights0 = vec2(1.0) - weights1;
+	// Adjust final weights by texture's height/depth + noise. 1 lookup
+	float noise3 = texture(noise_texture, uv*noise3_scale).r;
+	vec4 weights;
+	weights.x = blend_weights(weights0.x * weights0.y, clamp(mat[0].alb_ht.a + noise3, 0., 1.));
+	weights.y = blend_weights(weights0.x * weights1.y, clamp(mat[1].alb_ht.a + noise3, 0., 1.));
+	weights.z = blend_weights(weights1.x * weights0.y, clamp(mat[2].alb_ht.a + noise3, 0., 1.));
+	weights.w = blend_weights(weights1.x * weights1.y, clamp(mat[3].alb_ht.a + noise3, 0., 1.));
+	float weight_sum = weights.x + weights.y + weights.z + weights.w;
+	float weight_inv = 1.0 / weight_sum;
+
+	// Weighted average of albedo & height
+	vec4 albedo_height = weight_inv * (
+		mat[0].alb_ht * weights.x +
+		mat[1].alb_ht * weights.y +
+		mat[2].alb_ht * weights.z +
+		mat[3].alb_ht * weights.w );
+
+	// Weighted average of normal & rough
+	vec4 normal_rough = weight_inv * (
+		mat[0].nrm_rg * weights.x +
+		mat[1].nrm_rg * weights.y +
+		mat[2].nrm_rg * weights.z +
+		mat[3].nrm_rg * weights.w );
+
+	// Determine if we're in a region or not (region_uv.z>0)
+	vec3 region_uv = get_region_uv2(uv2);
+
+	// Colormap. 1 lookup
+	vec4 color_map = vec4(1., 1., 1., .5);
+	if (region_uv.z >= 0.) {
+		float lod = textureQueryLod(_color_maps, uv2.xy).y;
+		color_map = textureLod(_color_maps, region_uv, lod);
+	}
+
+	// Macro variation. 2 Lookups
+	float noise1 = texture(noise_texture, rotate(uv*noise1_scale * .1, cos(noise1_angle), sin(noise1_angle)) + noise1_offset).r;
+	float noise2 = texture(noise_texture, uv*noise2_scale * .1).r;
+	vec3 macrov = mix(macro_variation1, vec3(1.), clamp(noise1 + v_vertex_xz_dist * .0002, 0., 1.));
+	macrov *= mix(macro_variation2, vec3(1.), clamp(noise2 + v_vertex_xz_dist * .0002, 0., 1.));
+
+	// Wetness/roughness modifier, converting 0-1 range to -1 to 1 range
+	float roughness = fma(color_map.a - 0.5, 2.0, normal_rough.a);
+
+	// Apply PBR
+	ALBEDO = albedo_height.rgb * color_map.rgb * macrov;
+	ROUGHNESS = roughness;
+	SPECULAR = 1. - normal_rough.a;
+	NORMAL_MAP = normal_rough.rgb;
+	NORMAL_MAP_DEPTH = 1.0;
+
+}
+
+"

src/world/world.tscn

@@ -1,4 +1,4 @@
-[gd_scene load_steps=14 format=3 uid="uid://cwnwcd8kushl3"]
+[gd_scene load_steps=9 format=3 uid="uid://cwnwcd8kushl3"]
 
 [ext_resource type="Script" path="res://src/world/world.gd" id="1_ybjyx"]
 [ext_resource type="PackedScene" uid="uid://bm2o3mex10v11" path="res://levels/debug_level/debug_level.tscn" id="2_0xu5a"]
@@ -7,24 +7,10 @@
 [ext_resource type="Script" path="res://src/ui/world_ui.gd" id="2_imewa"]
 [ext_resource type="Resource" uid="uid://crock3revdn73" path="res://src/player/debug_player.tres" id="3_pyw81"]
 [ext_resource type="Script" path="res://src/world/play_manager/round_robin_manager.gd" id="5_h6mje"]
-[ext_resource type="Resource" uid="uid://c1pnqsddvey3m" path="res://src/equipment/clubs/drivers/debug_driver.tres" id="5_vde2u"]
-[ext_resource type="Resource" uid="uid://ck17u5yn6k0bi" path="res://src/equipment/clubs/irons/debug_iron.tres" id="6_86dlu"]
-[ext_resource type="Resource" uid="uid://dagld0q5krapu" path="res://src/equipment/clubs/putters/debug_putter.tres" id="7_1nw4u"]
-[ext_resource type="Resource" uid="uid://dthtc1no2c4wy" path="res://src/equipment/clubs/wedges/debug_wedge.tres" id="8_of7mw"]
-
-[sub_resource type="Resource" id="Resource_7tkuj"]
-script = ExtResource("2_e743i")
-life = 100.0
-name = "Gfolfer 2"
-color = Color(0.44, 0.645333, 1, 1)
-driver = ExtResource("5_vde2u")
-iron = ExtResource("6_86dlu")
-wedge = ExtResource("8_of7mw")
-putter = ExtResource("7_1nw4u")
 
 [sub_resource type="Resource" id="Resource_rdjhi"]
 script = ExtResource("5_h6mje")
-players = Array[ExtResource("2_e743i")]([ExtResource("3_pyw81"), SubResource("Resource_7tkuj")])
+players = Array[ExtResource("2_e743i")]([ExtResource("3_pyw81")])
 
 [node name="World" type="Node" groups=["WorldGroup"]]
 script = ExtResource("1_ybjyx")