Sculpting for Normal Maps - Game Character Creation with Blender and Unity - page 115

Smooth This brush makes smooth rough or bumpy geometry by moving vertices under
it to their average value. For faster sculpting, the hotkey for Smooth is Shift+LMB. This is
a great tool if geometry becomes overworked or fragmented, as in Figure 5.18. Figure 5.19
shows the same surface smoothed.

Figure 5.18
An overworked
sculpt surface

Figure 5.19
The surface
from Figure 5.18
smoothed

The options for the sculpting brushes are not only in the brush selection portion of
the shelf. There are other panels that can further customize the brush into the right tool
for you.