I'm been trying to figure this out for a while now. Just set up a scene that was large but not too intensive. City set by 3dmodelz, 2 vickies, 3 mikes. Go to render in p4 renderer and it renders fine, just no good render options like ray shadows. Go to render in Firefly and it hangs on "Adding Objects". Bar never moves. Left it running all night and nothing. I can move the little box around and max and min the poser window but no render. Also I have to 3 finger salute to shut poser down. So has anyone figured out what things are making Firefly go wheels up? I've had this happen in smaller scenes with only 2 vickies. I think its memory related since this happens more with figures I have the full MT set on than on figures that I have carved down to necessary MTs. (I'm not using v3 BTW) System: Home built asus v733 board with 2.4gig AMD Atahlon. 1.5 gigs DDR ram. TI 5200 video card. Lots of HD space for swap(close to 20 gigs.) I'm wondering if it has anything to do with rendering an enclosed environment. I'm using 3dmodelz worldz sphere for the panorama. Other renders that didn't work in firefly were also in enclosed structures that were figures like Beyond Bent's lab. But it dies at the add object stage not at rendering shadows. Very frustrating since its pretty unreliable.