I have this pixelisation issue before/after having baked the lights in my scene. It seems to be coming from some of the point lights in the scene. Baking at a lower lightmap resolution does seem to help.
shimmeringdistantleafcutterant
popularcavernousdodo
This shows the problem mentioned.
Myself and my college group have tired to find a solution but we’ve had no luck. This is a HDRP project. Any suggestions or info will be much appreciated!