Well, I have landed a sweet job, now have top quailty equipment at my disposal (after putting up with the bare minimum for so long!
) and I am trying to use Zbrush to its fullest extent. Is there 64 bit? If not, ETA? Seems very strange, seeing as MaxPolyPerMesh slider goes up to 50 millionā¦
small_orange_diamond
Found a solution. Apparently if you use HD Geometry, you can divide significantly higher. Have not explored HD much yet, but you can export out maps to capture that finer detail. Of course you can also split into subtools, but as for a unified mesh, HD is the way to go. Looking into it nowā¦
Hopefully this helps others as well. 
No, zbrush 4 is still only a 32bit application at this time. In my opinion this should be the #1 thing they work on for the next major update to zbrush, followed by fixes and improvements to existing tools (such as retopology).