YL: GI=Global Illumination. It's a similar thing to radiosity but I'm not sure what the technical differences are. I think both try to simulate the light that is reflected from an object after it hits it, but in different ways. Mike: It took a little over 37hrs to render at 640x480, Ultra mode, 16 subrays, quality threshhold up about 3/4 on a P3 500 w/ 384Mb ram. I should noted though that my hardrive is in dire need of reformatting. I think I'll set up a simple interior scene next fully textured and see how that looks. Hmmm...maybe I can incorporate this into this months challenge. Rich