What you need to do is to zoom in on the problematic part(s) of the model while in GPU rendering mode and then enable ray tracing. About the tessellation quality issue, it can be worked around but we do understand it is not obvious to the user how to do that. Fusion is a great piece of software don't hold it back because of the novice users, anyone getting into CAD has a long journey ahead of them that they either want to take or they don't. And if this level of control is already available Please document it, because I looked everywhere I could find info on rendering and saw nothing on this. Give me a resolution control for the rendered mesh.a button for coarse, medium and fine, like you do for exporting stl files for rapid prototyping. Don't do it for me because you don't know what I want. If this is a performance issue let me decide how long I want a local render to take. This is yet another reason I said in a past post that you are not exposing all the parameters to us.for the novice user that's fine, but if you want Fusion to be production ready then it needs to compete with the competition and its things like this that make community members vocal about it not being production ready.

Fusion 360 cloud rendering