id Software lead programmer John Carmack updated his .plan with some techie talk about how vertex lighting works in the new Q3A Demo Test. In addition to the techie stuff and his latest worklog, the update also offers a "set of go-fast-and-look-ugly options" for those looking to speed up their frame rate at the expense of eye-candy:

r_mode 2
r_colorbits 16
r_texturemode GL_LINEAR_MIPMAP_NEAREST
r_vertexlighting 1
r_subdivisions 999
r_lodbias 2
cg_gibs 0
cg_draw3dicons 0
cg_brassTime 0
cg_marks 0
cg_shadows 0
cg_simpleitems 1
cg_drawAttacker 0