That's some cool info. However, going back to what you said earlier, I seem to be a bit confused now as to what actually constitutes a microfacet BRDF. Why is Blinn-Phong considered microfacet based, but Phong is not? I know you can use modified phong as a distrobution in a microfacet BRDF, but I didn't think that an ordinary Blinn-Phong shader was considered to be a microfacet BRDF.

That's some cool info. However, going back to what you said earlier, I seem to be a bit confused now as to what actually constitutes a microfacet BRDF. Why is Blinn-Phong considered microfacet based, but Phong is not? I know you can use modified phong as a distrobution in a microfacet BRDF, but I didn't think that a ordinary Blinn-Phong shader was considered to be a microfacet BRDF.