thanks for replying guys. I downloaded teh videos and watched them yesterday and they did'nt really shed any light on what i wanted to know. they were discussing compositing and put it together. Furthermore they discussed still images and i anted to know about film. I wanted to know how you setup a video shot for composition. Like if i wanted teh bullet to come out of the gun do i just a bullet zipping by in maya and place it over teh footage with teh gun and move it around, resize, e.t.c. to make it fit or what.