removed an invalid assertion.
removed an invalid assertion.

when this assertion triggers, the BRDF implementation has set the mode to None (absorption).

Vertexwahn/appleseed,Aakash1312/appleseed,pjessesco/appleseed,aytekaman/appleseed,appleseedhq/appleseed,luisbarrancos/appleseed,glebmish/appleseed,pjessesco/appleseed,est77/appleseed,Biart95/appleseed,aytekaman/appleseed,dictoon/appleseed,dictoon/appleseed,glebmish/appleseed,luisbarrancos/appleseed,Aakash1312/appleseed,Aakash1312/appleseed,docwhite/appleseed,aiivashchenko/appleseed,est77/appleseed,appleseedhq/appleseed,dictoon/appleseed,glebmish/appleseed,Biart95/appleseed,appleseedhq/appleseed,gospodnetic/appleseed,glebmish/appleseed,Biart95/appleseed,pjessesco/appleseed,gospodnetic/appleseed,appleseedhq/appleseed,aiivashchenko/appleseed,docwhite/appleseed,Vertexwahn/appleseed,aiivashchenko/appleseed,Vertexwahn/appleseed,dictoon/appleseed,glebmish/appleseed,est77/appleseed,aytekaman/appleseed,Biart95/appleseed,pjessesco/appleseed,docwhite/appleseed,luisbarrancos/appleseed,Aakash1312/appleseed,docwhite/appleseed,Aakash1312/appleseed,gospodnetic/appleseed,luisbarrancos/appleseed,gospodnetic/appleseed,aiivashchenko/appleseed,pjessesco/appleseed,aiivashchenko/appleseed,aytekaman/appleseed,Biart95/appleseed,aytekaman/appleseed,dictoon/appleseed,gospodnetic/appleseed,docwhite/appleseed,est77/appleseed,appleseedhq/appleseed,luisbarrancos/appleseed,Vertexwahn/appleseed,Vertexwahn/appleseed,est77/appleseed