Interesting thread here. I have a AMD X2 4800+ and a benched it with Cinebench I got around 186% increase in rendering speed over just rendering with one core. It benches but rendered first using only one of the cores and then using both cores. Yes, Poser doesn't take advantage of multi-cpus. But I have noticed that it seems to do better when rendering on higher quality settings then it used to with my old AMD FX-53 single core chip. One thing I have noticed though is you can use it to run two copies of Bryce at the same time rendering and it will finish both renders nearly at the same time. I tested this using the same scene file in each. Bryce is only single threaded as well :(.