9

Camera Map Modifier (Object Space) 567
Capping group
Start—Caps the bottom of the extruded shape.
End—Capsthetopoftheextrudedshape.
Cap Type group
Morph—Selects a deterministic method of c apping
that provides the s ame number of vert ices for
morphing between objects.
Grid—Creates gridded caps that are better for cap
deformations.
Intersections group
Keep Lines From Crossing—Prevents beveled
surfaces from self intersecting. This requires more
processor calculation and can be time-consuming
in complex geometry.
Separation—Sets the distance that sides should be
kept apart to prevent intersections.
Came ra Map Modifier (Ob jec t
Space)
Select one object. > Modify panel > Modifier List >
Object-Space Modifiers > Camera Map
Select one objec t. > Mod ifiers menu > UV Coordinates
>CameraMap
The C amer a Map modifier (object-space version)
assigns planar mapping coordinates based on
the current frame and the camera specified in
the Camera Map modifier. This differs from the
Camera Map (WSM) modifier (page 1–513) that
updates the object’s mapping coordinates on every
frame.
Left: The tex t ure of an object with a camera map m odifier
matches the background when se en by the camera the
modifier uses.
Right: When seen by a camera not used by camera map, the
object’s texture is based on object geometr y.
B lending an Obj ect into the B ack ground
In the Procedures section (below), you ’ll be
blending an object into the background using the
Camera Map modifier. If the background uses the
same image as the object’s texture map, then the
object blends with the b ackground at the frame
where the modifier is applied and a camera is
specified. The object becomes visible if either the
camera or object moves. In order to make the
illusion work, you must assign the same map to
the background that you assign to the object.
Ma pping Coordinates
Because the accuracy of m apped objects depends
partly on the complexity of the mesh, the "blend to
background" effect works best when applied to an
object with a relatively high density of triangula r
faces. The necessary density a lso depends on the
distance of the object from the camera.
A simple box might look fine when it occupies only
a small portion of the background, but up close
the mapping will look distorted without adequate
tessellation. Some exper i mentation is required
to get an ideal mapping and still minimize the