diffuse - 251.725 sec
he - 278.814 sec
phong - 282.857 sec
blinn - 284.389 sec
poulin - 275.779 sec
lewis - 293.844 sec
torrance (0.08,1.6,-0.2,0.6,0.4) - 282.781 sec
torrance2 (0.3,13.22,-0.78,0.1,0.9) - 284.856 sec
ward Isotropic - 295.933 sec
ward Anisotropic - 294.288 sec
schlick single layer - 294.998 sec
schlick double layer - 295.36 sec
oren - 295.732 sec
strauss - 272.927 sec
lafortune - 254.755 sec
coupled - 287.936 sec
minnaert - (0.5,0.7) - 287.301 sec
minnaert2 - (5.0,1.0) - 283.651 sec
ashikhmin - (10,10,0.5,0.5) - 238.227 sec
ashikhmin2 - (1,1,0.1,1.0) - 239.456 sec
beardmaxwell - 258.853 sec