Zbrush 2022.0.8 ((free)) -

The flagship feature of ZBrush 2022, Mask Region , allowed users to mask complex shapes without reliance on topology. However, initial releases suffered from performance hitches and crashes when masking complex, high-resolution meshes.

Now hold Ctrl+Shift and draw a line. You just performed a polygroup cut and extruded it in one stroke. That’s not even documented. zbrush 2022.0.8

Release Scope and Goals

Unlike subscription software, ZBrush uses a perpetual license. Here is the safe path to get 0.8: The flagship feature of ZBrush 2022, Mask Region