I’ve been trying to do this for such a long time that I almost gave up on it. I want to render the cockpit of my airplane with ambient occlusion like in the picture. Whenever I try to render, the picture is either too grainy (not enough samples) or smooth and unnatural-looking when I set a higher sample number. I can see in this render that there is some kind of roughness to the surface…not grain, just a subtle unevenness. How can I get that result?