I've had experience with this in past versions, but it usually resolves upon quitting the game. I'm playing the new .63 experimental, and I noticed either when I alt+tabbed, or when I did so after adjusting brightness in game, that my desktop was MUCH darker than it was prior. Later the game crashed when trying to join a lobby, and now the screen is stuck dark. I tried launching it and exiting it again, no luck. Very annoying that the game has disrupted my own computers settings, not the first time either :(

If anyone knows a fix, let me know. Couldn't find anything online about it. Could have to do with specific software, or NVIDIA perhaps?