I've almost finished a photographic studio. It has 17 unique lights parented to figures. The same lights are in the library as normal presets, and I've made MATs to switch them on/off. These MATs list every light in the pack, and of course, if some of the lights aren't in the scene, they just won't be affected. I have similar MATs to switch shadows on/off, change the light warmth, etc. Can anyone think of a reason NOT to do this? I haven't had any problems in any version of poser, but purely out of paranoia, I thought I'd check just in case. mac