diffuse - 76.3164 sec
he - 82.2939 sec
phong - 75.747 sec
blinn - 76.0433 sec
poulin - 82.1067 sec
lewis - 77.7795 sec
torrance (0.08,1.6,-0.2,0.6,0.4) - 84.9933 sec
torrance2 (0.3,13.22,-0.78,0.1,0.9) - 82.7163 sec
ward Isotropic - 81.8313 sec
ward Anisotropic - 82.2181 sec
schlick single layer - 85.9618 sec
schlick double layer - 78.5695 sec
oren - 70.746 sec
strauss - 72.1862 sec
lafortune - 72.6812 sec
coupled - 74.4015 sec
minnaert - (0.5,0.7) - 76.6806 sec
minnaert2 - (5.0,1.0) - 76.5194 sec
ashikhmin - (10,10,0.5,0.5) - 72.7494 sec
ashikhmin2 - (1,1,0.1,1.0) - 72.8764 sec
beardmaxwell - 72.8101 sec