diffuse - 25.6518 sec
he - 27.7343 sec
phong - 26.758 sec
blinn - 26.3309 sec
poulin - 25.4608 sec
lewis - 26.1564 sec
torrance (0.08,1.6,-0.2,0.6,0.4) - 26.9723 sec
torrance2 (0.3,13.22,-0.78,0.1,0.9) - 27.8365 sec
ward Isotropic - 25.8775 sec
ward Anisotropic - 27.301 sec
schlick single layer - 26.3721 sec
schlick double layer - 27.8556 sec
oren - 25.7432 sec
strauss - 29.1558 sec
lafortune - 25.7175 sec
coupled - 26.2713 sec
minnaert - (0.5,0.7) - 26.9455 sec
minnaert2 - (5.0,1.0) - 26.7017 sec
ashikhmin - (10,10,0.5,0.5) - 26.3465 sec
ashikhmin2 - (1,1,0.1,1.0) -26.3292 sec
beardmaxwell - 25.9972 sec