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Viewport Background Dialog 41
Animation Synchronization group
Controls how sequences of images (for example,
from IFL (page 3–616), AVI (page 3–609),or
MOV (page 3–621) fi les) are synchronized to the
viewport for rotoscoping (page 3–1003).
Use Frame—The first field sets the first frame of the
incoming sequence that you want to use, and the
second field sets the last one.
Step—Sets the interval between the frames you
want to u se. For example, if this spinner is set to 7,
3ds Max uses every seventh frame.
Start At—Specifies the frame number at which you
want the first input frame to appear. What happens
in the view port before the start frame depends
on the option you choose for "Start Processing ,"
below.
Sync Star t To Frame—Determines which frame
from your incoming sequence is displayed at the
Start At frame. For example, you could have a
30-frame IFL sequence that st arts in your scene at
frame10,butyoucouldusethe5thframefromthe
IFL on frame 10 by sett ing Sy nc Star t to 5.
Star t Processing group
Determines what happens in the viewport
background before the start frame.
Blank Before Start—Mak es the viewport
background blank before the start f rame.
Hold B efor e Sta r t—Specifies that the viewport
background will contain the start frame.
End Processing group
Determines what happens in the viewport
background after the last input frame.
Blank After End—Makes the viewport background
blank after the last i nput f rame.
Hold Af ter E nd—Specifies that the viewport
background will contain the last input frame until
the last frame in the animation.
Loop A f ter E nd—Specifies that the viewport
background will loop from the end frame back to
the start fr ame, ad infinitum.
Aspect Ratio group
Controls the proportions of the viewport
background by matching it to the bitmap,
rendering output, or to the viewport itself.
Match V iewport—Changes the aspect ratio (page
3–911) of the image to match the aspect ratio of
the viewport.
Match B itmap—Locks the aspect r atio of the image
to the native a spect ratio of the bitmap.
Match R endering Output—Changes the aspect
ratiooftheimagetomatchtheaspectratioofthe
currently chosen rendering output device.
Note: When the Match Bitmap or Match Rendering
Output option is chosen, 3ds Max centers the
imageandclearstheedgesoftheviewporttothe
background color.
Display Background
Turns on display of the background image or
animation in the viewport.
Lock Zoom/Pan
Locks the background to the geometry during
zoom and pan operations in orthographic or
user viewports. When you Zo om or Pan the
viewport, the background zooms and pans along
withit.WhenLockZoom/Panisturnedoff,the
background stays where it is, and the geomet ry
moves independently of it. Use Match Bitm ap
or Match Rendering Output to enable Lock
Zo om/Pan. This control is disabled if you choose
Match V iewport.