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changes.mady.by.user Kristin Ivanova

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changes.mady.by.user Kristina Gaytandzhieva

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Overview

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The VRayStochasticFlakesMtl material can be used to simulate car paints, snow and other glittery materials. It works by simulating at render time the aggregated effect of a large number of mirror-like flakes scattered over the surface of an object. The material is somewhat similar to the VRayFlakesMtl and VRayCarPaintMtl materials, but uses less memory and avoids the tiling issues for these materials. The term stochastic means "using a random variable".

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titleUI Path: ||Right-click on the geometry|| > Assign New Material...
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||Right-click on the geometry|| > Assign New Material... > VRay section > VRay Stochastic Flakes Mtl


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||V-Ray Shelf|| > Right-click to Create V-Ray Materials button > VRay Stochastic Flakes Mtl

 

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||Hypershade|| > Window tab > Create... > VRay section > VRay Stochastic Flakes Mtl



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Input ramp using V space

 

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Only Yellow-colored flakes are produced. Click on the image for a larger resolution.

 

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Advanced Parameters

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Blend Min – Specifies the number of flakes per pixel below which the flakes are computed. When the number of flakes per pixel is above this value, the material gradually transitions into a smooth (non-discrete) BRDF.

Blend Max – Specifies the number of flakes per pixel above which the material will only compute the smooth (non-discrete) BRDF. If the number of flakes per pixel is below this value, the material gradually transitions into discrete flakes.

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References

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The VRayStochasticFlakesMtl material is based on the Chaos Group paper "A Practical Stochastic Algorithm for Rendering Mirror-Like Flakes" (PDF Download).