9

770 Chapter 8: Modifiers
youwanttoproceed. (Thesameistrueofthe
Automatic F latten UVs modifier. )
Pr ojecti on a nd Sub-Obj ect S election s
You can match geometry to sub-object selections.
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 objec t must 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 high-res target objects, assign
corresponding material IDs.
AneasywaytodothisistoapplytheMaterial
modifier (page 1–714).
3. In the Resolve Hit group of the Projection
Options dialog (page 3–165),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 high-res objects.
1. IntheProjectionmodifier,gototheFaceor
Element sub-object level.
See Selection Rollout (Projection Modifier) (page
1–771).
2. Make a sub-object selection, then on the
Reference Geometry rollout (page 1–772),enter
a descriptive name in the Name field.
3. Click the Add button or press Ent er .
Thenameofthesub-objectselectionsetis
added to the list.
4. Click in the list to highlight the selection-set
name, click Pick or Pick List, a nd 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 w ith different source
objects.
6. Choose Rendering > Render To Texture.
The Render To Texture d ialog appears.
7. In the Projection group of the Objects To Bake
rollout (page 3–158), turn off Object Level and
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.
Interfa ce
TheinterfacetotheProjectionmodifierincludes
these rollouts:
Selection Rollout (Projection Modifier) (page
1–771)
Soft Selection Rollout (page 1–963)
Reference Geometry Rollout (Projection Modifier)
(page 1–772)
Cage Rollout (Projection Modifier) (page 1–773)