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Enables the use of derivative normal maps. If you disable 'Use Derivatives' when using tangent-space normal mapping, the bump shader uses the tangent and bitangent data stored on the mesh. Otherwise (by default), the bump shader will use the UV surface derivatives from the Arnold shading globals.

Gamma Correct

Applies a Gamma gamma correction to the normal map. This will 'undo' any automatic gamma correction applied due to the texture gamma settings.