Thank you for sharing the issue. Сould you share your PC specs? Also, could you (if necessary) run a test build to help me understand what the problem might be?
305 days ago (+1)
The same problem, but in "Cave" and "Cave 2" areas everything is ok.After leaving this areas in lagged one, the game may crash with "Fatal error" message or just lag for a long time before crash. Also, with Anti aliasing 3 or higher, image become full black or even brighter than before(in both situations I can`t see anything).