r_picmip2

With r_picmip2 you can set the compression level for all textures in the game.

Usage:
/seta r_picmip2 3
then do:
/vid_restart

“0” is for maximum quality and “3” is less quality (it is for maximum performance which uses less video card memory).

Values between: “0” to “3”

Note:
However, I think this doesn’t exist in ET (it existed in RTCW)