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38 Chapter 2: Viewing and Navigating 3D Space
3.
The v iewport returns to the saved view.
Ifyou’renotsurewhetheraviewporthasa
saved view, check the Views menu. Restore
Active View is unavailable unless a view is saved
in the active viewport.
Viewport Background
Views menu > Viewport Background
Keyboard > ALT+B
This command displays the Viewport Background
dialog (page 1–38)
, which controls the display
ofthebackgroundimageintheactiveviewport.
Each viewport can display a different backgro und.
You can use this for mo deling, by placing f ront,
top or side view sketches in the corresponding
view ports. Or use Viewport background to match
3D elements with digitized cam era footage.
Viewport B a ck gr ound Di alog
Views menu > Viewpor t Background > Viewport
Background dialog
Keyboard > ALT+B
The Viewport Background dialog controls display
of an image or animation as the background for
oneorallviewports,forexampleforalignment
or
rotoscoping (page 3–1097) . You can assign
different background images to different
viewports.
Yo u s e l e c t t h e i m a g e o r a n i m a t i o n t o d i s p l a y i n
the active viewport, set the frame synchronization
between the animated image file and the current
scene, and turn the assig ned image on and off.
These changes
do not affect the rendered scene.
Toplaceanimageinthebackgroundofthe
rendered scene, use the Environment And Effects
dialog >
Environment panel (page 3–267) ,
accessed from the Rendering menu.
Note: When safe frames are displayed in a view port,
and the Aspect Ratio options are set to either
Match Viewport or Match Rendering Output, the
assigned viewport background image is confined
to the Live area of the safe frames and will correctly
match the rendered background bitmap.
Tip: If you are using a viewport driver with
hardware acceleration (OpenGL or Direct3D),
the viewport backg round might not appear. If
this happens, choose Customize > Preferences.
In the
View por ts preferences (page 3–874) ,click
Configure Driver. Then in the
Configure OpenGL
dialog (page 3–884)
or the Configure Direct3D
dialog (p age 3–888)
,gototheBackgroundTexture
Size group and turn on Match Bitmap Size As
Closely As Possible (
do not change the numeric
setting). Click OK in both dialogs to accept your
change.
See also
Select Background Image Dialog (page 1–42)
Update Background Image (page 1–44)
Reset Background Transform (page 1–45)
Procedures
To assign an image to one or all viewports:
1.
Act ivate a viewport where you want the
background image.
2. Choose Views menu > Viewport Background
to display the Viewport Background dialog.
3. In the Background Source group, click Files to
display the Select Background Image dialog.
4. Select the image or animation you want to use.
5. If you want to display the image in all viewports,
click All Views in the Apply Source And Display
To g r ou p.
6. Click OK.