https://bugs.winehq.org/show_bug.cgi?id=22785
--- Comment #25 from Oleg Kuznetsov oleg.kuznetsov@metamint.ru --- (In reply to Petrichor Park from comment #24)
I've tested this on a Windows box now and it also has the same geometry corruption. I think the program might just be broken.
I've just tried it on nVidia GeForce RTX 3060 Laptop + Windows 11 Pro and AMD Radeon 7790 + Windows 10 Pro. Both cards render the demo with the same corruptions as I said in comment 22 (unfortunately, I was unable to build GenThree for Linux, because I lack of skills, sorry :( ), so probably the bug could be closed as "invalid", unless there would be an instruction how to render the demo correctly on Windows