Operation Manual

172 Lines, Shapes, and Effects
You'll notice that Bump Maps and Pattern Maps come in two varieties: "2D"
and "3D." They are all three-dimensional effects—the 2D/3D distinction refers
to how each one achieves its result. With the "2D map" variants, you begin by
selecting a bitmap from a gallery. With the "3D" Bump Maps and Pattern
Maps, you first pick a mathematical function. The function-based maps
include data about the interior of the "space," while the bitmap-based maps
describe only surface characteristics.
Multiple effects. You can combine multiple 3D filter effects, as in the
illustration above. The effects are applied cumulatively, in a standard
"pipeline" sequence: 3D Bump > 2D Bump > 3D Pattern > 2D Pattern > 3D
Lighting.
3D Bump Map
The 3D Bump Map effect creates the impression of a textured surface by
applying a mathematical function you select to add depth information, for a
peak-and-valley effect. You can use 3D Bump Map in conjunction with one or
more additional 3D filter effects—but not with a 2D Bump Map.
2D Bump Map
The 2D Bump Map effect creates the impression of a textured surface by
applying a greyscale bitmap you select to add depth information, for a peak-
and-valley effect. You can use 2D Bump Map in conjunction with one or
more additional 3D filter effects—but not with a 3D Bump Map.