Hi All... Not sure if this is a Mental Ray or not... Couple of questions on a diamond tutorial I was following. > Why am I am getting so much grays, and not enough strong darks and lights? > Why isn't my gradients nice and smooth? If you look closely, there seems to be something like dithering going on. I went over the tutorial very closely and even the files. Not sure what I'm missing or what went wrong. i pointed out the dithered areas in red. links: https://www.rossow-web.com/diamonds.jpg https://www.rossow-web.com/diamond2.jpg Any help would be great. .roy.