I am sure ray trace questions come up all the time but here is mine. Some times my ray traces look great and sometimes so bad that I can not show to a client. Issues can be wall color all look pretty much the same, everything is very bright and grainy. I adjust sunlight, turn off most of the lights and others I turn the watts down to 25. I have the render to best. I know that ray trace settings can get very complex but any thoughts?