I am not sure what's happening, but I don't remember the lava making the room look dark in Crystal Tower. I remember the lava being bright and having bloom effects, but now it doesn't happen.

I'm using Nvidia driver 334.89 on Geforce GTX 650 Ti. I did not mess with the game's graphics settings nor the settings on the video card. I had this issue pop up on March 7th around 12 AM EST.

http://steamcommunity.com/sharedfile.../?id=237498092 a link to the image showing the oddity.