first draft of oily-skin model from DJ2006
rotation in integrate_frTS
wet work
it turns out the normal is always 0,0,1 in PBRT integrators
Merge branch 'master' of https://github.com/damlaren/pbrt-v2
deleting #file that was added by accident
Merge branch 'master' of https://github.com/damlaren/pbrt-v2
added a skin material based on DJ2006 (Spectral BSSRDFs for human skin)
core/api support for SkinMaterial
Modulation from oily skin now seems to be reasonable. Also commiting changes to dipolesubsurfaceintegrator to add some lines about the 'wet' class to it.
Merge branch 'master' of https://github.com/damlaren/pbrt-v2
oil on skin code-- reducing SSS works, but specular highlight isn't ramping up with amount of oil.
Merge branch 'master' of https://github.com/damlaren/pbrt-v2
merging with recent work by emily