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PARAMETERS |
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A Note About The Sample Images These sample images are of a plane seen from overhead, rendered to a rather small image size, using Raycast mode with 2x Anti-Alias. To compensate, the Squares value was set lower to make the stars bigger, and the Brightness was turned up, to ensure that the stars remained visible. The results of the shader look rather better in larger images! |
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Range : 0, 1 or 2 0 is Perlin, 1 is Classic, 2 is Sparse. |
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Range : 0 to 10 Set the octaves used in the noise to generate the stars. Higher values give more detail to the noise. Note that sometimes a small value, such as 1, will help keep the stars more precisely defined. |
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Range : 0 to 1000 A second noise function is applied to the result to change the distribution of stars. This noise function dampens the stars when the noise value returned is low. The Distribution Scale parameter controls the scale of this noise - low values will give broad, large areas where there are no stars, and higher values will give smaller but more frequent areas where there are no stars. |
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Range : 0, 1 or 2 0 is Perlin, 1 is Classic, 2 is Sparse. |
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Range : 0 to 1 This controls how dark the darkened areas will be. At a value of 1, the distribution noise has no effect (and the processing is turned off for faster rendering). At a value of 0, the distribution noise will darken the stars completely, leaving only the sky colour. At vales in between 0 and 1, the distribution noise will darken the stars by a smoothly varying amount (so at a value of 0.5, the stars will be half as bright in the dark areas). The sample images below show the effects of changing the Min Distrib Brightness. At a value of 0, the stars in the darkened areas disappear completely, at a value of 0.5, they are half as bright as the unmodified stars, and at a value of 1 the effects of the distribution noise are removed (and the processing turned off for faster rendering), so that you get only the effects of the Star Noise and Squares processing (this gives results somewhat similar to the original PixelNoise shader). |
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Range : 0 to 10 This acts as a multiplier to the brightness of the stars. At a value of 1, there is no change to the stars’ brightness. At values less than 1, the stars will be made less bright, and at values of greater than 1, the stars will be made brighter. This can help when rendering in Raycast mode, or when rendering to a smaller output image, by making the stars more visible to overcome the smoothing effects that can happen. |
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Range : Off or On If unchecked, the shader used Object Co-ordinates; if checked, it uses the UV space of the object. |
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Range : RGB values These set the colour of the stars and the colour of the sky. Note that Brightness values of greater than 1 will change the brightest colour of the stars. |
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TG StarField Parameters |
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