The r_dynamiclight turns dynamic lightning on or off.
/seta r_dynamiclight 1
Values: “1” (singlepass) or “2” (multipass)
Setting r_dynamiclight to “1” it helps (increases) your FPS (Frames per Second), so you will be able to see the movement smother.
Example: a rocket passing near you and lights the objects around it or explosions that give light.