This page provides information on the VRayMtlBump node.
The VRayBumpMtl adds bump map or normal map effects when using any material.
UI Path: ||Toolbar|| > V-Ray menu icon > Materials > VRayMtlBump
map – A slot for the texture that is going to be used as bump or normal map.
mtl – A slot for the material to which the bump or normal map effect is going to be applied.
Bump and Normal Mapping
Map type – Allows the user to specify whether a bump map or a normal map effect will be added to the base material.
Normal map in tangent space
Normal map in objectspace
Normal map in screen space
Normal map in worldspace
Bump multiplier – A multiplier for the bump/normal effect.
Bump shadows – When this option is checked V-Ray will consider the bump maps when rendering shadows produced by objects with the bump material applied to them.
Bump delta scale – Scale for sampling the bitmap when using bump mapping. The exact value is calculated automatically by V-Ray, but can be scaled here.