This page provides information about the VRayUserScalar texture in V-Ray for Cinema 4D.
Overview
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The VRayUserScalar texture allows the user to read and return a single number value of the currently shaded object as a result. This can be useful if the same material or texture is applied to several objects in the scene, but we want to control some of its aspects (i.e. material glossiness, or a blend between two other textures inside a Mix texture etc.) with user-defined properties.