pierre lepers

Results 5 issues of pierre lepers

Hi, Radiance filter create some artifact when gloss become low ( ~< 3 ). ![aabb_issue](https://cloud.githubusercontent.com/assets/1036540/9900601/25b6a75e-5c62-11e5-92cd-cc3ff013ace8.png) It seem to come from incorrect `filterSize` and thus incorrect filter areas (aabb). I'm not...

Input's param no longer generate code if removed from on of its possibly many inputs

For now alpha cutout is ignored during shaow's depth pass

enhancement