ZBrushCentral

Surface masking for thin wall geometry

New to Zbrush, is their a way to mask a surface with out the mask going thru to the other side using a brush or selection.
I have tried back face masking, also using a small brush size, that works but takes a very long time on a large surface.
The surface I have is concave, so a side view deletion of the back face that is masked doesn’t work using a selection.

Thanks

Attachments

Masking.jpg

http://docs.pixologic.com/reference-guide/brush/auto-masking/
See also polygroups, Group front may be helpful.