An occasional problem after I installed 2.91 is that renders will come out pixelated, even if denoising is on. Doesn’t matter which kind of denoising, the choice only seems ot make a difference whther things are pixelated, or pixelated with an ugly greyish purple wash. I’ve also been seeing weird problems with both the render preview and the render coming out incredibly dark, regardless of exposure settings.
Also the render preview refuses to show anything in the vewport except microscopic white pixels unless I have denoising on. This is not the way Blender was behaving when I was still using 2.90.1. I have been trying to trouble shoot this for acouple of days now, and I am fed up.
I am uploading a test scene which I have built using my standard settings, and which should allow people to reproduce the problems. I hope this helps someone more technically competent and smarter than I apparently am figure out what the problem is. Meanwhile, I am seriously inclined to roll back to 2.90.1 I am very disappointed in the new version. I have been eagerly awaiting this, and it turns out to be a kludge.
And before, someone takes me to task for it, yes, I have an opinion. It may not match yours. Yes, I’m expressing it too. (imagine that)
Another 291 Test scene.blend (1.2 MB)
Edited to add System info:
Win7 x64 Pro, AMD FX8350 8-core CPU, 16 GB RAM, MSI built Nvidia GTX1080 8GB GPU,