on the last one it almost looks like weird banding going on. Can’t figure what to do to avoid this, I tried different settings in gpulightmass but there’s always this odd discolored issue.
I’m using only SunSky system no other lights in the scene
Yes, you are correct. I should have mentioned that.
I suspect the problem is that the denoiser is being run after lightmap compression so it is just compounding the artifacts within the lightmap compression. Not much we can do except disable it and hope it gets fixed.