My name is michelle and I’m an animator from canada! 
Alright here is my situation.
I modeled a character mesh in maya. Now, I exported it as an obj, and opened mudbox. I made sure that it has no history.
Now i open mudbox, import the mesh, and I’m ready to start sculpting. Or so I thought. I press Shift + D to apply more scuplting levels. First level is ok. Now if I press it again to get a second level, Mudbox just closes down. Or freezes. Once it told me i had insufficiant memory to do that action. WHICH IS COMPLETE BULL. :banghead:
When i open up the default face or tree stump. I can get those up to 8m polys or 8 - 9 levels.
But on my model, i cant get pass 100 000 polys nor can i get beyond level 1
Please, isnt there anyone who can help me?