It`s looking great, thanks very much! Nevetheless I optimized it for shooters so that it`s blurring in x and y direction:

Code:
function post_motionblur(on)
{
	if(on == 1)
	{
		pp_set(camera,mtl_blur);
		while(1)
		{
			mtl_blur.skill1 = floatv(mouse_force.x*25+mouse_force.y*25);
			wait(1);
		}
	}
	else
	{
		proc_kill(4);
		pp_set(camera,NULL);
	}
}

[...]

post_motionblur(1); //turn the effect on

[...]

post_motionblur(0); //turn it off