The lightmaps aren't updated at all yet, so everything is static.
Figuring out how lightmap data gets to the gpu was a chore thanks to the
spaghetti in the bsp data, and then I'd forgotten that I was
pre-expanding the light data to rgb so wound up with weird lightmaps,
but without water or particles, demo1 is getting 5000fps at 800x450, and
it seems to be CPU limited.