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title: "Bump Attributes"
canonical: "https://documentation.chaos.com/space/VSKETCHUP/109790612/Bump%20Attributes"
format: markdown
---
This page provides information about Bump Attribute in V-Ray for SketchUp. Overview Parameters An  Add Attribute  button is provided for some V-Ray materials. Select additional attributes to add up to the appearance of the material. For more information see the  Add Attribute  on the   How to Work with Materials  page.   Mode/Map  – Specifies the bump map type. Bump Map  – A height map should be used. Bump Texture Channel  – Some V-Ray textures have a special bump channel output that can be used here. It is most commonly used for Round Edges effect. Edges texture is used as a bump. Normal Map  – RGB normal map should be used with this option. Note that in most cases the normal map bitmap color space should be set to Linear to ensure correct results. Amount  – Multiplier for the bump/normal map. Delta Scale  – Specifies a scale for sampling the bitmap when using bump mapping. The exact value is calculated automatically by V-Ray, but can be scalled here.