I have asked this before but did not really get an answer I think it deserves; Why have you set up the matte option as it is now in the later builds? Who want´s it to be this way?
To me it is totally useless and I have never seen a renderer / matte material, work this way.
As it is now, I have to render out two passes. one diffuse pass with the "shadow plane" hidden to camera, and then one shadow pass to get the shadow. The assumption that objects can get properly secondary light by a hdri image is to me very strange. or please, show me how to use this and how we get superior results.
/Daniel