To achieve highly detailed
modeling effects, you can directly transform, modify, and align
the geometry of objects at the
Sub-objects are the
pieces that make up objects, such as vertices and faces. You can
also access and transform the sub-object components of modifiers.
The particular geometry
available at sub-object level depends on the object type. See
Modifiers and Editable Objects for details
on each object type.
In a row of column
sub-objects, a single column has been modified at the sub-object
Watch a movie about Modifying
at the Sub-Object Level.
Making a Sub-Object Selection
These are the general
steps in setting up an object for sub-object selection. See
Modifiers and Editable Objects for more
- Convert the object into an editable object
such as an editable mesh, editable spline, editable poly, and so
on. (Some modifiers you can apply to the object, such as Edit Mesh,
Mesh Select or Spline Select, also have sub-object levels.)
TipWork in a wireframe
viewport so you can see the geometry.
- On the modifier stack display, click (the
plus-sign icon to the left of the name of the modifier or editable
object). This expands the object's hierarchy, showing the names
of the sub-object levels at which you can work.
- On the stack display, choose the kind
of sub-object geometry you want to work with: for example, Vertex,
Face, or Edge. Each sub-object selection level has rollouts with
their own sets of options.
The sub-object level
highlight is yellow by default.
- Use standard selection techniques to
select sub-object geometry, from a single sub-object to the entire
object. By default, the sub-object selection highlights in red.
Once you make a sub-object
selection of geometry, you can do any of the following:
- Apply any options supplied for the kind
of object and the selection level.
- Apply standard transforms: Move, Rotate,
Scale. For more information, see Transforming a Sub-Object Selection,
- Apply object-space modifiers (Bend, Taper,
and Twist, for example) to perform useful modeling operations.
- Apply object-space modifiers (UVW Map
or Smooth, for example) to perform useful surfacing operations.
- Bind a
space warp to
the selection. The rest of the object is unaffected by the warping.
- Use the toolbar commands
To View with face selections.
Transforming a Sub-Object
Using an editable mesh,
poly, patch, or spline, you can directly transform any sub-object
selection. However, “Select” modifiers like
Mesh Select and
Spline Select enable
To transform a sub-object selection made
with a Select modifier:
- Add an
XForm modifier to
the stack, following (or somewhere above) the Select modifier.
- In the stack, open the Select modifier
and make a sub-object selection.
- Choose XForm in the stack. You then transform
the XForm gizmo, which applies the transform to the selection.
Selecting and Transforming
Most modifiers have sub-object
components, such as a gizmo and center. Like sub-object geometry,
these components can be accessed and transformed at sub-object level,
directly modifying the object’s shape.
Other modifiers, like
those for free-form deformation, have control points and lattices
at a sub-object level. Moving these components creates the modeling
effects of the modifier.