2008 | OriginalPaper | Buchkapitel
Volumetric effects
Erschienen in: Writing mental ray® Shaders
Verlag: Springer Vienna
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In the last chapter, we attached a
volume shader
to the camera, giving us a final opportunity to modify the eye ray color before the sample is stored for later filtering to create a pixel. In this chapter, we’ll attach volume shaders to objects, transforming them into three-dimensional regions within which we can control the modification of the background color as the ray passes through the object.