This page provides information about the Environment fog in V-Ray for Cinema 4D.
Overview
V-Ray Environment Fog is an atmospheric effect that allows the simulation of participating media like fog, atmospheric dust, and so forth. Volumetric properties can be determined by 3D texture maps. The atmospheric effect can also be confined to geometry objects.
Environment Fog can use either of two algorithms to calculate volumetric lighting. The first algorithm is a simple exponential sampling scheme, which is used when there are no texture maps specified. In this mode, Environment Fog takes a number of random points inside the volume and calculates the volumetric lighting at those points. The second algorithm is a raymarching scheme, which is used when any of the volume properties are mapped with a texture. In that case, Environment Fog traverses the fog volume in small steps, calculates the volume properties at each step, and computes the volume lighting accordingly.
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