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Zbrush crash when "hide outside selected" on hi res mesh with subtools.

ZBrush Usage Questions
#1

Zbrush seems to crash whenever I “hide outside selected” a region of dense mesh that has some other subtools within it.

I.e.: A one-mesh, fullsize character (lvl 6, 2.3 mil polygons of active mesh) with subtools for eyes and teeth; if I want to isolate just the head with the eyes and teeth visible and green box over the entire lot, I get a crash every time. It doesn't happen if you try to do the same at lower resolutions.

I am running Vista 64-bit, 8gigs of ram and I experimented with different mem settings in preferences, as well as initializing zbrush to its defaults.

#2

I can do this just fine. Tried it on the demo soldier. I can not get it to crash.
win7 64 - 8GB ram - i7 something or another.
hideGeo.jpg

#3

Hmm, that’s strange. I tried it with the demo soldier and it didn’t crash. And I replicated with the same number of subtools and roughly the same polycount.

Must be something with my mesh then, although the only difference I can think of is that it was all (29 subtools) imported out of maya with goz.

#4

Edit:… nope… still crashes. Must be something with the mesh

Edit2: What’s bizarre is that it typically crashes after I up or down res them using “all low/all high” commands. I.e if a project is saved in “all low” - when I hit “all high” and try to isolate select I get a crash. Same for the opposite.

It doesn’t crash if I don’t use “all high/low” before doing the isolate select, or go up and down in subds manually.

#5

Ok, well my guess is that the problem is with my subtools, many of which contain several separate meshes. That used to cause crashes in t-pose master in zbrush 3.1 on “exit”. I don’t remember if the issue was still there in 3.5.

Although, I am now using more subtools with even more separate meshes, (up to 12 in some subtools and one with 20+) I guess "all high/all low" is a similar type of procedure to that in t-pose master and it makes zbrush very unstable with so many meshes in so few subtools. Using hide/unhide mask then acts as a killswitch. I deleted the subtool that had 20+ separate meshes and it got a bit more stable. I wish zbrush could support such complexity though. Subtool with 20+ separate meshes had my isolated stitching. I was also thinking of building a scene and importing grass made in maya...