8

Projection Modifier 761
item in the stack that is lower than the Projection
modifier,youseeawarningdialogthatasksif
youwanttoproceed. (Thesameistrueofthe
Automatic Flatten UVs mo difier.)
Pr ojecti on and S ub-Object Sel ections
You can match geometr y to sub-object select ions.
Therearetwowaystodoso:matchingmaterial
IDs, or matching named selections of sub-object
geometry.
Matching Material IDs
Here is a sample workflow for using material IDs
to match portions of the low-res object to different
high-res objects:
1. At the level of the low-res object itself,
assign differing material IDs to different face
selections.
To d o s o, t h e l ow - re s o bj e c t mu s t b e a s u r f a c e
model; that is, an editable mesh, editable
poly, editable patch, or NURBS surface. Use
the Surface Properties rollout to change the
material ID of sub-object selections.
2. For the hig h-res target objects, assign
corresponding material IDs.
Aneasywaytodothisistoapplythe
Material
modifier (page 1–706)
.
3. In the Resolve Hit group of the Projection
Options dialog (page 3–160)
,turnonHitOnly
Matching Material ID.
4. Render to texture.
Thetextureforfacesofthelow-resobject
receive texture element information only from
thesourceobjectthathadthecorresponding
mater ial ID.
Matching Selected Geometry
Here is a sample workflow for using sub-object
selections to match portions of the low-res object
to different hig h-res objects.
1. IntheProjectionmodifier,gototheFaceor
Element sub-object level.
See
Selection Rollout (Projection Modifier)
(page 1–762)
.
2. Make a sub-object selection, then on the
Reference Geometry rollout (page 1–763) ,
enteradescriptivenameintheNamefield.
3. Click the Add button or press ENTER.
Thenameofthesub-objectselectionsetis
added to the list.
4. Click in t he list to high light the selection-set
name, click Pick or Pick List, and then select
the high-res source object to associate with the
sub-object selection.
5. Repeat steps 2 through 4 to associate different
sub-object selections with different source
objects.
6. Choose Rendering > Render To Texture.
The Render To Texture dialog appears.
7. In the Projection group of the Objects To Bake
rollout (page 3–153)
,turnoffObjectLeveland
turn on Sub-Object Levels.
8. Click Render.
Render To Texture renders a separate texture
for each of the named sub-object selections
contained in the Projection modifier.
Interf ace
TheinterfacetotheProjectionmodifierincludes
these rollout s:
Selection Rollout (Projection Modifier) (page
1–762)
Soft Selection Rollout (page 1–945)
Reference Geometry Rollout (Projection Modifier)
(page 1–763)
Cage Rollout (Projection Modifier) (page 1–764)