This operator is a combined version of mask expand and mask by normal from the sculpt branch. It can be used to quickly isolate parts of a model based on topology or curvature.
- Shift + A starts the operator in topology mode from the active vertex
- Shift + Alt + A starts the operator in curvature mode from the active vertex
Reviewed By: brecht
Differential Revision: https://developer.blender.org/D5657