It's disappointing that nobody has replied. Similarly disappointing that the URL with the image I mentioned has only 3 unique visitors, 1 of which is me. Basically there's no support whatsoever on this forum. My only other topic also got 0 replies. Because of the bug I describe, I can no longer play Don't Starve. It used to be one of my favorite games, with 1000+ hours on record.
Any suggestion how I can fix this graphics distortion? https://steamcommunity.com/sharedfiles/filedetails/?id=2181309899 I'm guessing the integrated AMD Radeon video card is the problem. The machine is a HP Slim Desktop S01-AF0800ND. This is on a freshly installed Linux Mint 20 Ulyana machine.