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> - Always use "fresnel on" for reflections (don't forget to specify
> "ior"), or "metallic on" where applicable, and always use 0.0 for the
> minimum reflection (or leave it out, specifying the maximum reflection
> only).
If you are using fresnel, is it valid (from a PBR point of view) to even
scale the results using a maximum reflection other than 1?
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