hi everyone, I am having a problem with zbrush 4, I have 12gb of memory, but it seems I can´t get all the memory to work, can do much more than I did with my old 2gb, can someone tall me how to meke zbrush use all of the memory!!! 
ZBrush 4 is still a 32 bit app and can only use a maximum of 4 GB memory.
See this postfor the best Mem settings.
many thanks for the help!! 
I reduced my Tool undos to 1 or 2 when working on massive projects, it helps a lot. You have to remember that it’s the -minimum- number of undos. Then if ZBrush have enough memory, it will use more than what is set in preferences!
thanks again!!I am going to try all of this to see if it helps!!