The Bump and Normal Mapping rollout is part of the VRayMtl parameters.
Parameters
Map Type – Uses a bump or normal map to determine the bump effect on the material. See the Bump and Normal Mapping in V-Ray article to see detailed explanation on each map type and its typical usage.
Bump Map – Uses a bump map to determine the bump effect applied.
Normal map in tangent space – Uses a tangent normal map to determine the bump effect applied.
Normal map in object space – Uses an object space normal map to determine the bump effect applied.
Normal map in screen space – Uses a screen space normal map to determine the bump effect applied.
Normal map in world space – Uses a world space normal map to determine the bump effect applied.
Explicit Normal – Uses a world space normal map as the bump normal without conversion, regardless whether the input is a color or vector texture.
V-Ray GPU supports only Bump Map, Normal map in tangent space, and Normal map in world space map types.
Map – Allows the user to connect a texture for the bump or normal map. Leaving this unconnected turns off bump/normal mapping.
Bump Mult – A multiplier for the bump map effect.
Bump Delta Scale – This parameter can be decreased to sharpen the bump and increased to blur it. Available only when Map Type is set to Bump Map.
