Make sure that the diffuse is not looking at any alpha channel, and that the opacity map is. Then in the RTT dialogue, make sure to specify that you want to save the diffuse map out as a 32bit tga. Like thus: And, turn padding to 0. Max treats transparent texture areas like seam edges, and pads them into ugliness.
hi. how does one set up a Bake (Render to Texture) that will render out alpha maps correctly? clarification: i'm using a projection cage and an opacity map on the "source mesh". for the results of a color/diffuse map bake, the alphas render black rather than transparent . the opacity maps do affect the alpha, but do not…