I am having trouble controlling shadows. I am casting raytracing lights (with Raytracing on) down onto a model that has file textures plugging into Color, Bump. Spec AND Ambient channels. The Ambient specifically keeps the shadows on the surface from going fully black. I have lowered the color gain and do get better shadows but then lose my ambient color. Is there a way to get good ambience but also get my shadows to take in a controllable way?