yes, I agree - it's a very useful technique, easy to apply. one other thing they've suggested is to surround the lightsabre cylinder with several concentric cylinders to mimic the volumetric lite fx, but I feel this displacement method is more generally applicable. of course, in poser pro ($449) we may well have the GI variables fully implemented to interact with the atmosphere, but currently (poser 7) they don't produce any volumetric fx when activated via python script.