8

912 Chapter 8: Modifiers
Cylindrical map projection
Cap—Applies planar mapping coordinates to the
caps of the cy linder.
Note: If the ends of the object geometry are not at
rig ht angles to the sides, the Cap project ion bleeds
onto the sides of the object.
Spherical—Surrounds the object by projecting the
map from a sphere. You see a seam and mapping
singularities at the top and bottom of the sphere
where the bitmap edges meet at the sphere’s poles.
Spherical mapping is useful for objects that are
roughly spherical in shape.
Spherical map projection
Shrink Wrap—Uses spherical mapping, but
truncatesthecornersofthemapandjoinsthem
all at a single pole, creating only one singularity.
Shrink-wrap mapping is useful when you want to
hide the mapping singularity.
Shrink-wrap projec t ion
Box—Projects the map from the six sides of a box.
Each side projects as a planar map, and the effect
onthesurfacedependsonthesurfacenormal.
Each face is mapped from the closest box surface
whose norma l most closely para l lels its own
normal.
Boxprojection(shownonaboxandonasphere)
Face—Applies a copy of the map to every face of
an object. Pairs of faces sharing a hidden edge are
mapped with the full rectangular map. Single faces
with n o hidden edge are mapped with a triangular
portion of the map.