Does zbrush support smoothing groups? how do I import & export them between zbrush and 3ds max? Every time I import a model with smoothing groups into zbrush they all vanish and the model is without smoothing groups (every poly is visible).
from the lack of responses I gather Zbrush does not support them huh? perhaps I should elaborate. Any way I can at least set them up in zbrush from scratch if import/export isn’t supported?
Smoothing groups are a Max feature, and not part of the OBJ format. Have you tried using ZBC’s advanced search feature for “smoothing groups”? You’d get about 3 pages of results, some of which are specific to Max.
thanks mate I’ll search 
man im having the very same trouble, i did a search with no success, if u find some good answer on this pleeeasee, please post it here … it will be really apreciated…, ill keep researching this problem and if i find something useful ill post it here as well.
As long as you export only smoothing groups in your OBJ you could do this:
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Export the OBJ from Max.
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Open in a text editor that can handle large files and do a search and replace, replacing the ‘s’ tags with ‘g’. This changes them to regular groups.
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Import the edited OBJ into ZBrush. Your smoothing groups should appear as regular polygroups.
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Ctrl+Shift+Click to show a single group and press Tool: Geometry: Crease.
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Repeat (4) for the other groups.