ComfyUI/blueprints/Edge-Preserving Blur.json

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  // Blur radius (0–20, default ~5)\nuniform float u_float1;   // Edge threshold (0–100, default ~30)\nuniform int u_int0;       // Step size (0/1 = every pixel, 2+ = skip pixels)\n\nin vec2 v_texCoord;\nout vec4 fragColor;\n\nconst int MAX_RADIUS = 20;\nconst float EPSILON = 0.0001;\n\n// Perceptual luminance\nfloat getLuminance(vec3 rgb) {\n    return dot(rgb, vec3(0.299, 0.587, 0.114));\n}\n\nvec4 bilateralFilter(vec2 uv, vec2 texelSize, int radius,\n                     float sigmaSpatial, float sigmaColor)\n{\n    vec4 center = texture(u_image0, uv);\n    vec3 centerRGB = center.rgb;\n\n    float invSpatial2 = -0.5 / (sigmaSpatial * sigmaSpatial);\n    float invColor2   = -0.5 / (sigmaColor * sigmaColor + EPSILON);\n\n    vec3 sumRGB = vec3(0.0);\n    float sumWeight = 0.0;\n\n    int step = max(u_int0, 1);\n    float radius2 = float(radius * radius);\n\n    for (int dy = -MAX_RADIUS; dy <= MAX_RADIUS; dy++) {\n        if (dy < -radius || dy > radius) continue;\n        if (abs(dy) % step != 0) continue;\n\n        for (int dx = -MAX_RADIUS; 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