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rShaders Snow is a procedural shader able to re-produce realistic snowly surfaces.
It can be used alone or in a sub-material channel to achieve complex effects like snow covering objects in the scene. It is very fast to be rendered and contains a lot of simple parameters to obtain maximum control over it.
In general parameters you can find stuffs like the color/purity control, a simple complete color corrector tool to work on brightness, saturation and a color variation parameter. To mantain under control the over-exposure problem for a near white surface like that, you can change the diffusion and roughness value of the shader.
The specularity of the shader is controlled and tuned by a crystallization simulator but the user can change par of the base glossiness and specular level to maximize the configuration possibilities.
The internal bump layering system can simulate 3 kind of effects like the micro snow bumping, the perturbation due to the snow irregularity and a land perturbation value due to the snow accumulation over the time. The user can be able to add a custom bump map layer also.
The shader has the possibility to activate a displacement perturbation layer, but if the user will need to add complex realistic effects like footsteps or something else, can add a custom displacement map.
Last but not less important, the shader has a “freezing” parameter to control the typical color reflectance due to the freezing of the water crystals in the surface.
Here you can see some technical rendering test done with the actual beta release. Rendertime is between 2 and 10 seconds with all the features in use. Stay tuned for the final gallery.
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