[Capt.ArD]

basically what he is trying to say is that a conveyor belt is a repeating motion, and you only need to render the motion for ONE tux to got from point A to point B, and repeat it. This will create the illusion that they are different tuxes, all moving along together. A little easier said than done, and only really feasible for a shot with a moving camera. try looking into path constraints, which would make keyframing the tuxes easier.

about lighting, i would not use radiosity. if i recall correctly, you have to calculate the lights for every frame. use lighttracer or mental ray, they don't look as good, but are faster and easier. go for a line of soft-edged spotlights with a yellow-almost-white color, with the light volumetric. this way the background is in shadows, but the conveyor belt is lit up. it'll add feeling and atmosphere, but not be hellish. add a few ambient lights. For the paint machine have a blue light or a white shining out of the holes to make it look like something cool is bout to happen or something. just spice up what you got.

just tips. it looks good.