9

Render to Tex ture: Objects to Bake Rollout 159
Ifthebakedtextureshowsvisibleseamswhenyou
view it in shaded viewports or renderings, try
increasing t his value.
Projection Mapping group
This group contains t he controls for generating a
normal bump projection. See Creating and U sing
Normal Bump Maps (page 3–150)
Enabled—When on, normal bump projection is
enabled using a Projection modifier (page 1–769).
When off, the Projection modifier is not us ed.
Default=off.
To generate a normal map rather than a normal
bump map, leave Enabled turned off.
Mod if i er d r op-down li st—When an object has been
chosen, this list shows the Projection modifier. If
multiple Projection modifiers have b een assigned,
their names are visible in the list as well.
Pick —Clicktopickthehigh-resolutionobjectfrom
which the Projection modifier will derive normals.
Clicking Pick displays a Select Objects dialog (page
1–78), which lets you select one or mor e objects on
which to base the normals map.
Opti ons —Click to display the Projection Options
dialog (page 3–165), which contains various
normal bump projection settings. When
Individual is chosen (at the bottom of this rollout),
the options affect the selected object; when All
Selected or All Prepared is chosen, the options
apply to all the selected or prepared objects.
Object Level—When on, projects from the object
level of the hig h -resolution object. Default=on.
•
Put to Bak ed Mater ial—(The default.) When
chosen, the object-level projection is rendered
in the baked material.
Sub-Object Levels—When on, uses the active
sub-object selection. Default=on.
•
Put to B aked Material—When chosen, the
sub-object level projection is rendered in the
baked material.
The follow ing options apply to sub-object
rendering, when only a portion of the geometry is
being rendered to the normal bump map:
•
Full Siz e —(The default.) When chosen, the size
of the normal bump map is the same as if all
geometry were being rendered.
•
Propor ti onal—When chosen , the size of
the normal bump map is fitted to the size
of sub-object selection. The Proportional
Mult iplier on the Projection mod ifier’s
Reference Geometry rollout (page 1–772) can
change the default size of the proportional map.
Forexample,consideraplanethatis4segmentsx
4 segments. Each "poly" in the plane is a separate
sub-object, for a total of 16 sub-objects. If the
outputMapSizeis64,theobjectrenderingoutput
is 64 x 64 pixels. If Full Size is chosen, each
sub-object rendering is also 64 x 64 pixels. If
Proportional is chosen, each sub-object rendering
is 16 x 16 pixels. If you change Proportional
Multiplier to 2.0 in the Projection modifier, each
sub-objectrenderingisnow32x32pixels.
Mapping Coordinates group
Object—These controls are for basing the rendered
texture on the object level of the s ource object.
•
Use E x i s ti ng Cha n nel —When chosen,
unwrapping u ses an existing map channel.
•
Channel—When Use Exi sting Cha nnel is
active, lets you choose the channel to use for
unwrapping.
•
Use Automatic Unwrap—(The default.) When
chosen, uses automatic unwrapping, and
applies an “Automatic Flatten UVs” (Unwrap
UVW) modifier (page 1–878) to the objects
whose texture is being rendered.