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random_surface(3) Arcan Lua API random_surface(3) NAME random_surface - Generate a pseudo-random image surface. SYNOPSIS vid random_surface( int:width, int:height ) random_surface( int:width, int:height, string:method=uniform-3 ) random_surface( int:width, int:height, string:method=uniform-4 ) random_surface( int:width, int:height, string:method=fbm, float:lacunarity, float:gain, float:octaves, int:xstart, int:ystart, int:z ) random_surface( width, height, method ) DESCRIPTION This function is used to create pseudorandom noise textures, a useful building block in many graphics effects. If no method or an unknown one is specified, it will default to 1 channel randomness from the global csprng, duplicated into the RGB channels of a RGBA destination buffer (A=fully opaque). The other methods, uniform-3 and uniform-4 work similarly, but have different values in 3 or all 4 channels. FBM creates fractal noise by adding multiple octaves of perlin noise together. EXAMPLE function random_surface0() a = random_surface(64, 64); b = random_surface(64, 64, "uniform-3"); c = random_surface(64, 64, "fbm", 2, 0.5, 6, 0, 0, 0); show_image({a,b,c}); move_image(b, 64, 0); move_image(c, 0, 64); end image August 2026 random_surface(3)
NAME | SYNOPSIS | DESCRIPTION | EXAMPLE
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