fixed regression introduced in 19632dce838d359e8b5b92c0e492c5ac989cb28f ("Added option to to force textures and/or colours to be interpreted as linear_rgb").
reimplementing translation of Phong/Blinn materials using the new microfacet BRDF in appleseed (work in progress).
Merge pull request #115 from dictoon/master

fixed regression, and reimplementing translation of Phong/Blinn materials