8

Configure OpenGL Dialog 885
Inter face
Implementation-Specific Settings group
Redraw S cene On W indow Ex pose—Redraws the
whole scene when a dialog over the viewports
is moved, resulting in smoother dragging of
dialogssuchastheMaterialEditororTrackView.
However, redrawing takes some time. Default=on.
Ifyour3dsMaxdisplayeasilybecomesmessyor
"corrupted," turn this option on and then redraw
view por ts by choosing Views > Redraw All Views
(the default keyboard shortcut for this is the "1"
key).
This option has two subordinate options. How
you should set them depends on how the display
card handles its back buffer, which is used for
refreshing the screen. Turn on one or the other,
as appropriate.
Full S creen S wapB uf fer s D estr oys B ack B uf fer —If,
after upd ating the screen, the display card
destroys the back buffer
only when there’s a single
viewport,turnonthissub-option.TheOpenGL
driver redraws the scene when a single viewport is
visible, but doesn’t have to redraw when multiple
view por ts are visible. Default=off.
Wi nd owed Swa pBuf f er s Des t roys Ba ck Bu f fer—If,
after up dating t he screen, the display card destroys
thebackbufferwhenmultipleviewportsare
visible, turn on this sub-option. Default=off.
Use Tri a ngle S tr ip s—Strips al l geometric data
before sending it to the dr iver. In some cas es, such
as when topology is constantly changed, the time
taken to strip the geometry can cause a slowdow n
instead. In such cases, turn off this option.
Otherwise, leave it on for speed. Default=on.
This option has one subordinate option:
Display Wir eframe Objects Using Triangle
Strips—
Default=off.
Allow Dua l Plane Support—Uses the front/back
plane system when redrawing the viewport. The
selected object is manipulated in the front plane
and is redraw n, while other objects remain on
the back plane and are not redrawn. This default
setting provides the fastest redraws under norma l
circumstances. If your assigned display driver
doesn’t support du al planes, this option is not
available.
Tu rn off this setting to improve redraw speed if you
are rotating the whole scene or moving a camera
through the scene (usually situations in which the
whole view port needs to be redrawn anyway).
Use Incre menta l Scene Upda tes—Redraws only
those scene objects that have changed, or that
intersect a region changed by another moving
object. When tur ned off, the entire scene is
redrawn for each new frame. Default=on.
If your 3ds Max display becomes messy or
"corrupted" as a result of incremental updates,
turn this option off and then redraw viewports by