Groups Loops

From ZBrush Info

The Groups Loops feature inserts edge loops around the existing polygroups. The Tool cannot have subdivision levels, so before doing this operation you will need to remove the higher and/or lower Subdivision levels if they exist.

These are the options that can be adjusted prior the operation:

• GL Count: the slider sets the number of loops to insert.
• GL Smooth: the slider sets the amount of smoothing allowed during the operation.
• GL Triangle: set on for allowing triangles

To follow a step by step technique using GroupsLoops and Masking by Polygroup see Vamp Armor by Geoff Priest