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Per LearnOpenGL (PBR), Physically Based Rendering uses which microfacet-based reflection model?
APhong specular only
BFlat-shaded BRDF
CGoraud lighting
DCook-Torrance BRDF
Answer & Solution
Correct answer: D. Cook-Torrance BRDF
LearnOpenGL PBR: Cook-Torrance BRDF with D (distribution), F (Fresnel), G (geometry) terms. Roughness + metallic params drive the look.
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