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The fresnel blend layer mode performs a weighted addition of the two materials, with the base material being weighted by the top materials transmission. This ensures that energy is conserved.

This is the simplest layer mode and is very commonly used in material models. It matches the behaviour of the MaterialX layer node.

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Rough gold base layer and dielectric top layer with varying IOR (1.0-3.0)

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These images show a collection of simple and common material configurations, inspired by Weidlich and Wilkie's arbitrarily layered micro-facet surfaces . These have been rendered with both the fresnel blend mode, and rough coating mode.

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