You know, I've never actually tried to make Carrara choke...heheh, now I'm curious. I have been able to do a render with 4 mil figures in the past without Carrara crashing so I guess that's good. I do recall once having the app crash on me once when I started a render featuring two sanctum arts armors and a mil figure, along with various assorted scenery bits. It happened right at the start of the render, and the second time around seemed to go OK (if a bit slow). As I understand it however, SA products generally tend to be very resource intensive.