Wow,15 poser figures,no wonder it it taking ages to render thats gonna be a huge file to work with.I have a 900 athlon with 256 meg of ram and find if my file size goes much above 70 meg it grinds to halt much like yours is doing. Your video card wont make much difference(I have a Voodoo 5500 and it still slows)its all to do with processor speed and ram,if you are paging to hard disk then that will really kill your speed and need to buy more RAM,also avoid volume materials amd lights in your scene as these are killers also. One trick I use alot to reduce my load is to use picture objects rather than actual Poser meshes particularly for the distant figures.Just pose your figure in Poser how you would like it to appear in the scene (adjust lighting angle to same as your scene),render it with no ground or background and save the image as a .tif file.Load picture into photoshop and create a mask(black background,white figure).Now create the figure in Bryce as a picture object,it will render almost instantly and take up a tiny amount of room.