Masking only visible part of model - ZBrushCentral
AskZBrush: “How can I delete polygons using Masking?” - YouTube
can't mask by rows and colums - ZBrushCentral
Delete Hidden Geometry in ZBrush - YouTube
Best way to make organic holes in a thin mesh (like a ragged cape, perforated / fenesrate foliage, or thinly-sliced Swiss cheese)? Accidental tutorial. : r/ZBrush
Hiding masked in Zbrush. {solved} — polycount
Mouth-bags and Facial Expressions in Zbrush | by MrMcAngry | Medium