■ Importing and Preparing a Mesh for Sculpting 93
- Select the Smooth brush and smooth the mouth area. This will have the effect of spreading
the mouth faces open. You can also get good results using the Inflate brush set to ZSub, as
this will push faces apart (Figure 3.25).
Store a morph target Open mouth with Smooth
brush to separate faces
Switch to stored morph target The mask remains, allowing you
to easily manipulate the upper lip
or lower lip separately
Mask lower lip with
Lasso mask
Figure 3.25 Opening the mouth with the Smooth brush
This process is somewhat involved, so you would not want to repeat it each time
you want to open the mouth. Although the mesh is masked, we can easily create a
polygroup; therefore, hiding one half of the mouth is easier.
- With the lower lip still masked, select Tool →
Visibility and click the HidePt button.
HidePt will hide any unmasked faces. With the
lower lip visible, you can now polygroup it sepa-
rately from the rest of the head (Figure 3.26).
ZBrush 4 introduced a new brush mask called
Topological Masking to help alleviate the issue of
moving clips and other objects that may be close
together, such as toes. Access this setting by choos-
ing Brush → Auto Masking → Topological Masking
(Figure 3.27). The Range slider will control how far
from the center of the brush the effect will carry.
The brush will only affect those points topologically
close to the brush center, not physically close. This
means you can move the upper lip independently of
the lower because they are only physically close while
Figure 3.26 Polygrouping the lower lip Figure 3.27 The
Topological
Masking settings
under the Brush
menu
