Sculpting a Mermaid Character with Dynamesh - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 421

Head Details
In this section, we will start to add some more details to the head of the figure. Starting with the crest fin and
moving on to eyes, lips, and details. We are nearly done with the Dynamesh phase and are ready to move
into traditional ZBrush sculpting.
1. Mask the top of the mesh with a marquee. Isolate a strip of faces, which we will use to create the top
fin ( Figure 7-51 ) .
2. Using the Move brush, pull the fin faces up and shape them as seen in Figure 7-52 .
Figure 7-51: Mask the top of the head to create a cranial fin.