I've been having a problem with both the Spec and Lighting pass in Vray when using alpha blended materials. A variety of passes are going to a Comp team for the final image but Spec and Lighting are giving me problems. The images below illustrate the problem I'm having.
The Beauty doesn't show anything odd, and looks accurate to the alpha blend material. However inside the Specular and Lighting passes the alpha blend areas seem to be adding a value on top of the existing spec and lighting values giving this bizarre blow out and ruins the pass. The far right element in the images is the way I need it to appear infront of a similar texture with Spec and Lighting values.
My understanding is that the Spec and Lighting passes are additive and the fully alpha'd areas are still getting a flat value added to them. The Material is a vray Blend using a simple ramp between the base mat with spec/reflection and a fully transparent vray Mtl.
Any help at all on this problem would be fantastic.
-mBrant
The Beauty doesn't show anything odd, and looks accurate to the alpha blend material. However inside the Specular and Lighting passes the alpha blend areas seem to be adding a value on top of the existing spec and lighting values giving this bizarre blow out and ruins the pass. The far right element in the images is the way I need it to appear infront of a similar texture with Spec and Lighting values.
My understanding is that the Spec and Lighting passes are additive and the fully alpha'd areas are still getting a flat value added to them. The Material is a vray Blend using a simple ramp between the base mat with spec/reflection and a fully transparent vray Mtl.
Any help at all on this problem would be fantastic.
-mBrant
Comment