Ashikhmin-Shirley

roughness = 4, 9:28

roughness = 64, 9:34

roughness = 512, 8:58

• Cook-Torrance

roughness = 0.05, 9:16

roughness = 0.55 8:40

roughness = 1.0 8:31

• Scretched-Phong

exponent = 4, 11:53

exponent = 256, 9:35

exponent = 1024, 8:44

 

• Ward-Duer

roughness = 0.05, 12:39

roughness = 0.55, 10:40

roughness = 1.0, 8:29