Roughness Material Constant vs Texture Test
Screenshot
Description
This file contains six meshes, the left three specify roughness values of 0.0, 0.33, and 0.66 specified via a texture. The right three meshes similarly specify roughness, however the value is authored as a constant on the UsdPreviewSurface material.
Specification: https://graphics.pixar.com/usd/release/spec_usdpreviewsurface.html#roughness-vs-glossiness
The meshes are aligned intentionally to make it easy to compare lighting between the textured and constant versions. The intended use for debugging is to catch a light highlight directly on the split between meshes to enable easy visual inspection of the lighting response (see below).
The roughness values are packed into a single texture, with the red channel set to 0.00, the green channel set to 0.33, and the blue channel is set to 0.66.
Note: that in the screenshots above, usdview is rendering the mesh as semi-transparent, which is incorrect.
Created on contract by Nika Somkhishvili.
License Information
To the extent possible under law, Unity has waived all copyright and related or neighboring rights to this asset.
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RoughnessTest.usdz
# USDZ File Hierarchy
- RoughnessTest.usdc (30.21 KB)
- 0/roughness-spec.png (29.08 KB)
- 0/roughness.tga (192.04 KB)