2010

Table Of Contents
Preparing a surface for sculpting
Because a head is roughly spherical, you can create a primitive sphere as a
quick starting point for creating a head and face.
To prepare a sphere for sculpting
1 Make sure youve done the steps in
Preparing for the lessons on page 149.
2 Select Create > NURBS Primitives > Sphere > . In the options window,
select Edit > Reset Settings, enter the following values, then click the
Create button:
Radius: 6
Number of Sections: 30
Number of Spans: 30
The Radius sets the spheres size in grid units. A value of 6 creates a sphere
big enough to use the grid for size comparison.
The Number of Sections sets the number of vertical curves, called isoparms,
for the sphere. Isoparms show the outline of the surface shape. The more
isoparms a surface has, the more CVs it has. (By default, CVs are not
displayed.) More CVs means better precision as you edit a surface. The
Number of Spans sets the number of horizontal isoparms.
The drawback to having too many CVs is that youll have a harder time
making smooth shape changes to broad regions. Lots of CVs also means
slower processing time as you work with the surface. Its best to make
surfaces with as few CVs as necessary.
We chose 30 Sections and Spans for this lesson because experience has
shown that this allows adequate facial subtlety without slowing Maya
operation on a workstation of modest processing power.
Preparing a surface for sculpting | 157