Graphics Reference
In-Depth Information
Figure 4-31
Redder areas are shinier.
You'll also notice that the only component of this material that really depends on the underlying object's
structure is the AO map. Wouldn't it be nice if you could reuse the rest of this node setup for other objects with
similar-looking materials and grunge patterns? It's possible to do this using node groups, which function as or-
dinary reusable Blender datablocks.
To create a reusable datablock for this node setup, you need to first separate the AO pass texture component,
whichmustbeuniquetoindividualobjects(assumingtheyhavedistinctshapesandsurfacecharacteristics).For
this reason, the Texture Coordinate node must be duplicated so that it is not shared by the AO Texture node.
Whenyou'vedonethis,youcansimplyselectalltheothernodesexceptfortheMaterialOutputnode,asshown
in
Figure 4-32
,
and group them with Ctrl+G, resulting in the NodeGroup node shown in
Figure 4-33
.
