Asset Creation: Maya Character Creation - Creating Games with Unity and Maya - page 219

Figure 8.66 Inserting extra
subdivision to allow for round fingers.
Why?
This will likely create new polygons all the way up the arm and into the
chest—not to worry, we will make use of these later. However, without
this additional collection of polygons, the fingers would always be square.
With this one extra loop, we get a new edge on the inside and outside of
every digit, which means a more rounded shape can be sculpted in.
Step 85: Add loops to the thumb. Sculpt the new vertices to refine the
hands ( Figure 8.67 ).
Figure 8.67 New vertices sculpted
to better define the hand.