feat: Update colors and add texture effects for floor, ceiling, and wall shaders

scripts/cube_logic.lua

@@ -576,9 +576,9 @@ local function create_room_objects()
     local wall_outer_edge = wall_offset + room.wall_thickness
     log_debug("Room walls: inner=%.2f outer=%.2f", wall_inner_edge, wall_outer_edge)
 
-    local floor_color = {0.08, 0.26, 0.55}
-    local wall_color = {0.78, 0.38, 0.18}
-    local ceiling_color = {0.72, 0.9, 0.96}
+    local floor_color = {0.18, 0.45, 0.25}
+    local wall_color = {0.75, 0.35, 0.2}
+    local ceiling_color = {0.85, 0.85, 0.76}
 
     local objects = {
         create_static_cube({0.0, floor_center_y, 0.0},

shaders/ceiling.frag

@@ -4,6 +4,12 @@ layout(location = 0) in vec3 fragColor;
 layout(location = 1) in vec3 fragWorldPos;
 layout(location = 0) out vec4 outColor;
 
+float hash(vec2 p) {
+    return fract(sin(dot(p, vec2(63.1, 157.9))) * 43758.5453123);
+}
+
+const vec3 SURFACE_TINT = vec3(0.9, 0.93, 0.8);
+
 const vec3 LIGHT_POSITIONS[8] = vec3[8](
     vec3(13.0, 4.5, 13.0),
     vec3(-13.0, 4.5, 13.0),
@@ -27,7 +33,14 @@ float calculateAttenuation(float distance) {
 }
 
 void main() {
-    vec3 baseColor = clamp(fragColor * 1.15, 0.0, 1.0);
+    vec3 baseColor = clamp(fragColor * 1.15 * SURFACE_TINT, 0.0, 1.0);
+    vec2 gridUv = fragWorldPos.xz * 0.45;
+    vec2 grid = abs(fract(gridUv) - 0.5);
+    float gridLine = step(0.48, max(grid.x, grid.y));
+    float speckle = hash(floor(fragWorldPos.xz * 3.0));
+    baseColor *= mix(0.94, 1.04, speckle);
+    baseColor *= mix(1.0, 0.84, gridLine);
+
     vec3 ambient = AMBIENT_STRENGTH * baseColor;
     vec3 lighting = vec3(0.0);
 

shaders/floor.frag

@@ -4,6 +4,12 @@ layout(location = 0) in vec3 fragColor;
 layout(location = 1) in vec3 fragWorldPos;
 layout(location = 0) out vec4 outColor;
 
+float hash(vec2 p) {
+    return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453123);
+}
+
+const vec3 SURFACE_TINT = vec3(0.35, 0.6, 0.35);
+
 const vec3 LIGHT_POSITIONS[8] = vec3[8](
     vec3(13.0, 4.5, 13.0),
     vec3(-13.0, 4.5, 13.0),
@@ -27,7 +33,15 @@ float calculateAttenuation(float distance) {
 }
 
 void main() {
-    vec3 baseColor = clamp(fragColor * 1.1, 0.0, 1.0);
+    vec3 baseColor = clamp(fragColor * 1.1 * SURFACE_TINT, 0.0, 1.0);
+    float checkerScale = 0.55;
+    float cx = step(0.5, fract(fragWorldPos.x * checkerScale));
+    float cz = step(0.5, fract(fragWorldPos.z * checkerScale));
+    float checker = abs(cx - cz);
+    float grit = hash(floor(fragWorldPos.xz * 2.2));
+    float pattern = mix(0.82, 1.08, checker) * mix(0.96, 1.04, grit);
+    baseColor *= pattern;
+
     vec3 ambient = AMBIENT_STRENGTH * baseColor;
     vec3 lighting = vec3(0.0);
 

shaders/wall.frag

@@ -4,6 +4,12 @@ layout(location = 0) in vec3 fragColor;
 layout(location = 1) in vec3 fragWorldPos;
 layout(location = 0) out vec4 outColor;
 
+float hash(vec2 p) {
+    return fract(sin(dot(p, vec2(91.7, 127.3))) * 43758.5453123);
+}
+
+const vec3 SURFACE_TINT = vec3(0.9, 0.55, 0.3);
+
 const vec3 LIGHT_POSITIONS[8] = vec3[8](
     vec3(13.0, 4.5, 13.0),
     vec3(-13.0, 4.5, 13.0),
@@ -27,7 +33,16 @@ float calculateAttenuation(float distance) {
 }
 
 void main() {
-    vec3 baseColor = clamp(fragColor * 1.05, 0.0, 1.0);
+    vec3 baseColor = clamp(fragColor * 1.05 * SURFACE_TINT, 0.0, 1.0);
+    float axisSelector = step(abs(fragWorldPos.z), abs(fragWorldPos.x));
+    float coord = mix(fragWorldPos.z, fragWorldPos.x, axisSelector);
+    float plankScale = 0.4;
+    float plank = abs(fract(coord * plankScale) - 0.5);
+    float groove = smoothstep(0.46, 0.5, plank);
+    float grain = hash(floor(vec2(coord * 1.2, fragWorldPos.y * 2.0)));
+    baseColor *= mix(0.92, 1.05, grain);
+    baseColor *= mix(1.0, 0.78, groove);
+
     vec3 ambient = AMBIENT_STRENGTH * baseColor;
     vec3 lighting = vec3(0.0);