Autodesk 12812-051462-9011 User Guide 3 - Page 584

the map (center is: U=0.5,V=0.5). With both of these, you can rotate the gradient using the angle parameter under Coordinates, which is animatable. Noise group Amount When nonzero (ranges from 0 to 1), applies a noise effect. This perturbs the color interpolation parameter using a 3D noise function based on U, V, and Phase. For example, a given pixel is halfway between the first and second color (the interpolation parameter is 0.5). If noise is added, the interpolation parameter would be perturbed by some amount so that it may become less or more than 0.5. Regular Generates plain noise. This is the same as Fractal noise with the Levels setting at 1. When the noise type is set to Regular, the Levels spinner becomes disabled (because Regular is not a fractal function). Fractal Generates noise using a fractal algorithm. The Levels option sets the number of iterations for the fractal noise. Turbulence Generates fractal noise with an absolute value function applied to it to make fault lines. The noise amount must be greater than 0 to see any effects of turbulence. Size Scales the noise function. Smaller values give smaller chunks of noise. Phase Controls the speed of the animation of the noise function. A 3D noise function is used for the noise. The first two parameters are U and V and the third is phase. Levels Sets the number of fractal iterations or turbulence (as a continuous function). Noise Threshold group When the noise value is above the Low threshold and below the High threshold, the dynamic range is stretched to fill 0-1. This produces a smaller discontinuity at the threshold transition and thus causes less potential aliasing. Low Sets the low threshold. High Sets the high threshold. Smooth Helps make a smoother transition from the threshold value to the noise value. When smooth is 0, no smoothing is applied. When it is 1, the maximum amount of smoothing is applied. 2D Maps | 5839