lend;\\n }\\n\\n float sdf3d(vec3 p) {\\n float a = sdfa.sdf3d(p);\\n float b = sdfb.sdf3d(p);\\n if(k <= 0.0) return max(a, b);\\n float h = clamp(0.5 - 0.5*(b-a)/k, 0.0, 1.0);\\n return lerp(b, a, h) + k*h*(1.0-h);\\n }\\n}\\n\\nstruct SDF3DTranslate : SDF3D {\\n S sdf;\\n vec3 offset;\\n\\n __init(S shape, vec3 translation) {\\n sdf = shape;\\n offset = translation;\\n }\\n\\n float sdf3d(vec3 p) {\\n return sdf.sdf3d(p - offset);\\n }\\n}\\n\\nstruct SDF3DRotate : SDF3D {\\n S sdf;\\n mat3 rotation;\\n\\n __init(S shape, mat3 rot) {\\n sdf = shape;\\n rotation = rot;\\n }\\n\\n float sdf3d(vec3 p) {\\n return sdf.sdf3d(mul(transpose(rotation), p));\\n }\\n}\\n\\nstruct SDF3DScale : SDF3D {\\n S sdf;\\n float scale;\\n\\n __init(S shape, float s) {\\n sdf = shape;\\n scale = s;\\n }\\n\\n float sdf3d(vec3 p) {\\n return sdf.sdf3d(p / scale) * scale;\\n }\\n}\\n\\nnamespace sdf3d {\\n\\n func sphere(float radius) -> SDF3DSphere {\\n return SDF3DSphere(radius);\\n }\\n\\n func box(vec3 size) -> SDF3DBox {\\n return SDF3DBox(size);\\n }\\n\\n func torus(vec2 radii) -> SDF3DTorus {\\n return SDF3DTorus(radii);\\n }\\n\\n func cylinder(float radius, float height) -> SDF3DCylinder {\\n return SDF3DCylinder(radius, height);\\n }\\n\\n func union(S1 sdf1, S2 sdf2, float k = 0.0) -> SDF3DUnion {\\n return SDF3DUnion(sdf1, sdf2, k);\\n }\\n\\n func subtract(S1 sdf1, S2 sdf2, float k = 0.0) -> SDF3DSubtract {\\n return SDF3DSubtract(sdf1, sdf2, k);\\n }\\n\\n func intersect(S1 sdf1, S2 sdf2, float k = 0.0) -> SDF3DIntersect {\\n return SDF3DIntersect(sdf1, sdf2, k);\\n }\\n\\n func translate(S shape, vec3 offset) -> SDF3DTranslate {\\n return SDF3DTranslate(shape, offset);\\n }\\n\\n func rotate(S shape, mat3 rotation) -> SDF3DRotate {\\n return SDF3DRotate(shape, rotation);\\n }\\n\\n func scale(S shape, float scale) -> SDF3DScale {\\n return SDF3DScale(shape, scale);\\n }\\n\\n}\\n\\n// ==== Raymarcher Parameters ===\\n\\nstruct CameraParams {\\n vec3 position;\\n vec3 target;\\n vec3 up;\\n float fov;\\n}\\n\\nstruct RaymarchParams {\\n int maxSteps;\\n float epsilon;\\n float maxDistance;\\n float stepScale;\\n}\\n\\nstruct LightingParams {\\n vec3 lightDir;\\n vec3 lightColor;\\n vec3 skyColorTop;\\n vec3 skyColorBottom;\\n float lightIntensity;\\n float ambientIntensity;\\n}\\n\\nstruct ShadowParams {\\n int maxSteps;\\n float softness;\\n float minDist;\\n float maxDist;\\n}\\n\\nstruct AOParams {\\n int samples;\\n float stepSize;\\n float intensity;\\n float falloff;\\n}\\n\\nstruct MaterialParams {\\n vec3 albedo;\\n float roughness;\\n float metallic;\\n}\\n\\nstruct FogParams {\\n float density;\\n vec3 color;\\n}\\n\\nstruct RenderParams {\\n CameraParams camera;\\n RaymarchParams raymarch;\\n LightingParams lighting;\\n ShadowParams shadow;\\n AOParams ao;\\n MaterialParams material;\\n FogParams fog;\\n float normalEpsilon;\\n float gamma;\\n}\\n\\n// ==== Raymarcher ===\\n\\ninterface Raymarcher {\\n vec3 render(vec2 uv, RenderParams params);\\n}\\n\\nstruct RaymarchSDF3D : Raymarcher {\\n T scene;\\n \\n vec3 calcNormal(vec3 p, float epsilon) {\\n vec2 e = vec2(epsilon, 0.0);\\n return normalize(vec3(\\n scene.sdf3d(p + e.xyy) - scene.sdf3d(p - e.xyy),\\n scene.sdf3d(p + e.yxy) - scene.sdf3d(p - e.yxy),\\n scene.sdf3d(p + e.yyx) - scene.sdf3d(p - e.yyx)\\n ));\\n }\\n \\n float calcAO(vec3 pos, vec3 nor, AOParams params) {\\n float occ = 0.0;

@compute.toys