© Square Enix © Goodbye Kansas


Table of Contents

This page provides details on how to use the optimized Bump Material in V-Ray.


Overview


The BRDFBump gives the ability to add bump map and normal map effects when using any material.

Simply connect a material into the BRDFBump node to add additional bump or normal map functionality. Stacking multiple BRDFBump nodes together can create a more complex surface material by allowing the use of several bump and/or normal maps together easily.


Node


The BRDFBump node provides inputs for controlling various material properties. Most inputs correspond to parameters in the section below.

base_brdf – Specifies a base material to which the bump/normal effect is added.



Parameters


Type – Specifies whether a bump map or a normal map effect is added to the base material. 

Bump – Applies the map as a bump map.
Normal (Tangent) – Applies the map as a normal map in tangent space.
Normal (Object) – Applies the map as a normal map in object space.
Normal (Camera) – Applies the map as a normal map in screen/camera space.
Normal (World) – Applies the map as a normal map in world space.
Explicit Normal – Applies the map as an explicit normal.

Bump Shadows – When enabled, offsets the surface shading point in addition to the normal.

Compute Bump For Shadows – When enabled, V-Ray computes bump mapping for shadow rays in case the material is transparent. When disabled, V-Ray skips the computation and uses the bump map for shadow rays (faster rendering).

Bump Amount – Specifies the strength for the bump/normal effect.

Bump Delta Scale – Scale for sampling the bitmap when the Type is set to Bump mapping. The exact value is calculated automatically by V-Ray and is tied to the ray differentials, but can be scaled here.

Maya Compatible – When enabled, the BRDFBump tries to match the Maya bump/normal mapping.





Example: V-Ray Bump Material vs V-Ray Material with Bump


In this example, bump maps are used for the surface of the table. Both V-Ray Material and V-Ray Bump material can control the strength of the bump map by using a multiplier. The V-Ray Bump material has a higher multiplier value than the V-Ray Material bump map.



VRayMtl
Bump Material