Using 2020.2.0b8 with HDRP 10.1.0 I’m getting randomly something that looks like pixelated shadows. And when that happens there’s a huge performance drop so that I can hardly move in the editor. Looks like this:
I disabled all point lights and only have 1 Directional Light for reproduction. There are no errors in the console.
I removed everything one after the other until only a terrain, a Reflection Probe and Screen Space Global Illumination remained. The problem was still there. Then I loaded the full scene again and disabled all Reflection Probes and Screen Space Global Illumination and the problem was still there. It’s not that easy to track I guess. Gonna make a repro case and file a bug report.