This page provides details on how to use the optimized Bump Material in V-Ray.
The VRayBumpMtl gives the ability to add bump map and normal map effects when using any material.
Simply connect a material into the VRayBumpMtl node to add additional bump or normal map functionality. Stacking multiple VRayBumpMtl nodes together can create a more complex surface material by allowing the use of several bump and or normal maps together easily.
Image courtesy of Renato Eiras
||Hypershade|| > Create panel > VRay section > VRay Bump Mtl
||Create Render Node window|| > VRay section > VRay Bump Mtl
||V-Ray Shelf|| > Right-click Create V-Ray Materials button > VRay Bump Mtl
Base Material – Allows the user to select the base material to which the bump/normal effect will be added.
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 object space
Normal map in screen space
Normal map in world space
Local space bump map
Map – Specifies the bump/normal map that is going to be used.
Note: When a texture with color corrections is used as a normal map, V-Ray will display a warning for unexpected results.
Bump Mult – A multiplier for the bump/normal effect.
Bump Shadows – When enabled, V-Ray will consider the bump maps when rendering shadows produced by objects with the bump material applied to them. For more details, please see the Bump Shadows example below.
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.
Example: Bump Shadows
When Bump Shadows are enabled, V-Ray takes into account shadows produced by objects with the bump material applied to them. In the images below, a checker map is used to bump the tiles for slightly different heights, as well as bumping the lines between the tiles. When Bump Shadows is turned on, the reflection of the train on the reflective floor tiles has been affected. Whereas when Bump Shadows is not turned on, the bump from the reflective floor tiles plays no part in how the shadows and reflection are rendered.
The beauty render with Bump Shadows turned on. Notice how the reflection and shadows have changed in the reflective floor tiles.
The beauty render with Bump Shadows turned off