9

932 Chapter 8: Modifiers
• UV W X Form and U nwrap UV W s—These two
modifiers also contain Channel option buttons.
•
Mater ial Editor Channel Assi gnment—Yo u
assign the channel to be used by a map in the
Coordinates rollout at the map lev el in the
Material Editor .
• The assignment varies depending on the t ype
of map:
2D Maps—In the Mapping list for the Texture
option, you can choose Explicit Map channel,
Vertex Color Channel, Planar from Object
XYZ, or Planar from World XYZ.
3D Maps—At the top of the Coordinates rollout,
thereisaSourcelistwhereyoucanchoosean
Explicit Map Channel, Vertex Color Channel,
Object XYZ, or World XYZ. Use the Map
Channel spinner to define the channel number.
•
NURB S S ur fa ce Objects a nd Sub-Objects—Let
yo u specify which Map channel the surface
uses.
Alignment group
X/Y /Z—Select one of t hese to flip the alig n ment of
the mapping gizmo. Each specifies which axis of
the g izmo is a ligned with t he local Z axis of the
object.
Note: These options aren’t the same as the Flip
check boxes beside the U/V/W Tile spinners. The
Alignment option buttons ac tually flip the gizmo
orientation, while the Flip check boxes flip an
assigned map’s orientation.
Manipulate—When on, a gizmo appears on the
object that lets you change parameters in the
viewport. When Real-World Map Size is on,
Manipulate is available only with the Planar and
Box mapping types. For more information, see
Manipulators for UVW Map (page 1–924).
Tip: Turn on snapping to adjust the mapping
precisely.
Fit—Fits the g izmo to the extents of the object and
centersitsothatit’slockedtotheobject’sextents.
Unavailable when Real-World Map Size is on.
Center—Moves the gizmo so that its center
coincides with the center of the object.
Bitmap Fit—Displays the standard bitmap file
browsersothatyoucanpickanimage.Unavailable
when Real-World Map Size is on.
For planar mappings, the map icon is set to the
aspect ratio of t he image. For cylindrical mapping,
the height (rather than the radius of the gizmo) is
scaled to match the bitmap. For best results, first
usetheFitbuttontomatchtheradiusoftheobject
and gizmo, and then use Bitmap Fit.
Normal Align—Click and drag on the surface of the
object to which the modifier is applied. The origin
of the gizmo is placed at the point on the surface
wherethemouseispointing;theXYplaneofthe
gizmo is aligned to the face. The X axis of the
gizmo lies in the object’s XY plane.
Normal Align respects smoothing g roups and uses
the interpolated normal based on face smoothing.
As a result, you can orient the mapping icon to any
part of the surface, rather than hav ing it "snap" to
face normals.
V iew Align—Reorients the mapping gizmo to
face the active viewport. The size of the icon is
unchanged.
Region Fit—Activates a mode in which you can
drag in the viewports to define the region of the
mapping gizmo. The orientation of the g izmo is
not affected. Unavailable when Real-World Map
Size is on.
Reset—Deletes the current controller controlling
the gizmo and plugs in a new one initialized using
the Fit function. Any animation to the gizmo is
lost. As with all the align ment options, you can
cancel the reset operation by clicking Undo.