r_subdivisions

Giving r_subdivisions a lower value it gives you smother curves of objects around you.

Usage:
/seta r_subdivisions 64
then do:
/vid_restart

Values: between “4″ and “999″
Default: 4

Note:
r_subdivisions sets the step size of a subdivision, not exactly the number of subdivisions.
It doesn’t lower or increase your fps considerably.