VertexNormal - Polycount WikiGame artists can manually alter the vertex normals to change the way an in-game mesh is lit, how it renders a reflection, how the fresnel falloff looks, etc. Basically any lighting effect that uses vertex normals can be tweaked by changing the model's vertex normals. Some game engines do not import edited vertex normals. For example UDK has been updated to support custom vertex normals via FBX, bu
HairTechnique - Polycount Wiki
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