Doublefrost

Doublefrost A3

More minor visual tweaks and changes
Hopefully fixed all black brush faces?
Ice is now slippery
Some new assets added
Repacked the map because I forgot that was a thing I had to do until now
Cleaned up a bunch of little tweaks (thanks megapieman) and made some minor adjustments to stuff and things.

Tweaked the fog triggers to hopefully make it harder to cheese.

Dramatically improved visleaf cuts, cutting compile time by almost 2/3rds of how long it took before on a full compile (!)

Improved clipping in a number of places

Theoretically fixed the black brush faces, I dunno yet, I haven't looked.

More feedback is always welcome, feel free to pick them nits.