This page provides information on the User Attributes set that can be added to meshes.
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Allows the user to specify their own attributes, which can then be accessed with the User-defined Color Map (VRayUserColor) and User-defined Scalar Map (VRayUserScalar) textures to provide per-object values for shading attributes. They can also be used in the file name of File nodes to resolve the bitmap file name on a per-object basis. Several attributes can be specified in the string, separated with a semicolon ';' character. User attributes can also be specified on transform nodes. The final string of user attributes for a given object is a concatenation of the user attributes specified on the shape of the object and the user attributes specified on its parent nodes along the DAG path. This allows to conveniently add attributes to a large part of the DAG hierarchy.
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Starting with V-Ray 5.0, when user attributes are used in the beginning of a file path, V-Ray treats the path as absolute. For example, if a file node loads a texture from <userAttribute>/texture.png, the path is treated as absolute and the Maya project path will no longer be prepended.
UI Path: ||Select mesh|| > Attribute Editor > Attributes menu > VRay > User Attributes
