The images in this group use either the NOISE() or TURB() functions, or one of the related functions.
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Alien Blob | The noise function is used to perterb a series of concentric rings, produced by SIN(D). |
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Clouds | In this picture, the saturation function uses the turbulence function (TURB) to provide a cloud-like desaturation of the skyblue field provided by the hue function. The brightness value is also raised, using the same function. |
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Marble | Passing the absolute value of TURB (which normally returns values in the range -1 thru 1) to SQRT causes sharp black "veins" to appear, which have the appearance of marble. |
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Lightning | In this picture, I'm inverting the result to create a "lightning" effect. The time value is used with the 3-D turbulence function to create a movie of lightning that mutates over time. |
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Cloud Sphere | The higher frequency TURB is used to add texture to the overall pattern, while the lower frequency NOISE is used to provide the color shifts. |
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Color Blobs | A concentric color gradient is significantly perturbed by the NOISE function. The blobs can be made to mutate, if you use the NOISE3D function with time as the third dimension. |
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Noise | Your basic noise function. This one outputs values in the range 0 thru 1. Another one to try is GNOISE(x,y,0) which outputs values in the range -1 to 1. GNOISE is a more recent addition, and doesn't look quite as "blocky" as the NOISE function. |
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Oil Spill | This image simulates the irridescent colors seen in a puddle of oil (remember the "fidget" toy?). The noise function is used to perterb a series of concentric rings, produced by SIN(D). |
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Rainbow Turbulence | A radial color ramp is perturbed by the TURB() function. Thomas Pynchon fans, rejoice! |
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Turbulence | The basic turbulence function, which outputs values ranging from -1 to 1. An alternate, that is useful for movies is TURB3D(x,y,z). If you animate the Z parameter using "t", you can create mutating turbulence fields, similar to shifting clouds. |