Just loaded up the new alpha to work on a map, and was at first outraged.
I had set my texture detail to 1/8; and when I loaded my map almost all my objects were black and the ground didn't seem to load correctly.
I tried with other maps and had the same issue.
SO I placed the texture detail at full, even though from past testing I wouldn't get a playable fps. But guess what? Now i'm getting around 60 fps were I was getting around 25 with 1/8 texture detail.
I'm not sure what happened, but thank you!