Better value for MaximumNumberOfPeels and OcclusionRatio of 3d renderer

I trie to find a better compromise between perf and quality. If you want to test your own values :

MaximumNumberOfPeels + OcclusionRatio  close to 1  -> better perf.

MaximumNumberOfPeels high + OcclusionRatio close to 0 -> better rendering.