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Make sure flakes normals are always in the same hemisphere as the original normal.
Match C++ patterns
Match RenderMan 23 C++ scenes but may slow down your render. Use only when necessary.
Manifold
The manifold over which to apply the flakes.
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Make sure flakes normals are always in the same hemisphere as the original normal.
Match RenderMan 23 C++ scenes but may slow down your render. Use only when necessary.
The manifold over which to apply the flakes.
...