cg_atmosphericEffects

The cg_atmosphericEffects displays or not the atmospheric effects like snowing or raining.

Usage:
/seta cg_atmosphericEffects 1
then do:
/vid_restart

Values: “1” (displays) or “0” (not displays)
Default: “1”

Note:
Setting cg_atmosphericEffects off helps (increases) your FPS (Frames per Second), so you will be able to see the movement smother. In the same time it reduces the lag.

cg_coronas
what are cvars?