8

862 Chapter 8: Modifiers
the stack. The Turn To Mesh modifier takes the
sub-object patch selection into account and selects
the mesh faces that derive from the patch selection.
Object—Uses Object as the select ion level for
passing up the rest of the stack.
Edge—Uses Edge as the sub-object selection level
for passing up the rest of the stack.
Vertex—Uses Vertex as the sub-object selection
level for passing up the rest of the st ack.
Face—Uses Face as the sub-object selection level
for passing up the rest of the stack.
Tu rn To Patch Modifier
Make a selection. > Modify panel > Modifier List >
Object-Space Modifiers > Turn to Patch
Make a selection. > Modifiers menu > Conversion > Turn
to Patch
The Turn To Patch modifier lets you apply object
conversions in the modifier stack. Using the
Turn To Patch modifier, you can fine-tune the
conversion process such as turning quads into
quad patches.
Note: Converting from one object type to another
causes a complete caching in the modifier stack.
When you have large objects in your scene, this
can take up a lot of space. For example, an object
that starts as a mesh, converts to a patch, and then
back to a mesh takes 3 times as much space as a
mesh which just has ordinary modifiers like Bend
or UVW Map applied.
Tip: Turn To Patch can be useful on patches,
allowing you to invert a selection or change the
selectionlevelinamodifierthatdoesn’tdepend
on topology.
Procedure
Ex ample: To collaps e to quad patches:
1.
Create a chamfer box in wireframe: Create
panel > Geometry > Extended Primitives >
Object Type rollout > ChamferBox button.
2. Apply a Turn To Patch modifier: Modify panel
> Modifier List > Turn To Patch.
3. R ight-click the stack display and choose
Collapse All.
Interf ace
Qua ds to Q ua d Pat ches—Tur ns qua d face s in
meshes or polymeshes into quad patches.
Note: Whenyouturnthisoptionoff,3dsMax
tr iangulates quads when the Turn To Patch
modifier is applied to a mesh or poly object.
Sub-objec t S ele ctions group
These options control the selection of sub-objects.
Preserv e—Passes the sub-object selection up the
stack. For example, if you have an object that you
have conver ted from an ed itable mesh, and you’ve
selectedapolygon,thenwhenyouapplyaTurn
To Patch modifier, the patch, which is derived
from the selected polygon, remains selected.
Default=on.