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FrozenBurning / Relighting4D

[ECCV 2022] Relighting4D: Neural Relightable Human from Videos
https://frozenburning.github.io/projects/relighting4d/
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alpha = roughness squared in microfacet BRDF #15

Open Feez2403 opened 2 months ago

Feez2403 commented 2 months ago

Hello again :)

I am looking into the BRDF you are using.

Why is alpha = roughness squared (gamma(x) ^2) in your work ?

The original paper https://www.graphics.cornell.edu/~bjw/microfacetbsdf.pdf just takes alpha values without squaring them.

Is it just a way to remove negative roughness when training ?

FrozenBurning commented 2 months ago

Thanks for your interest in our work! We refer you to the implementation of the BRDF used in NeRFactor.