Object media is now part of a new feature called interior . Media is not just a rename for halo. It is a new model with some similar features of halo. New patterns spherical , cylindrical , planar , and boxed added for pigment , normal , texture , and density . Interior contains information about the interior of the object which was formerly contained in the finish and halo parts of a texture .
Interior items are no longer part of the texture.
Instead, they attach directly to the objects. The refraction keyword is no longer necessary. Any ior other than 1.0 turns on refraction. These 5 finish keywords which are now part of interior will still work in finish but will generate warnings.