The Interdimensional Traveler: A Full Body Character Design - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 142

Continuing the Head Crest
At this point I feel the silhouette of the head is drab and needs to be revisited. Using the Move brush, I mask
out a strip of faces behind the existing head crest structure.
1. Use the Move brush to pull the faces up as seen in Figure 3-42 .
Figure 3-42: Isolate a strip of mesh behind the crest with a mask, then pull the unmasked faces up.