2008

Width and Height Let you set the resolution of the output image by
specifying the width and the height of the image, in pixels. With Custom
format, you can set these two spinners independently. With any other format,
the two spinners are locked to the specified aspect ratio, so adjusting one alters
the other. The maximum width and height is 32,768 x 32,768 pixels.
Preset resolution buttons (320x240, 640x480, and so on) Click one of these
buttons to choose a preset resolution. You can customize these buttons:
right-click a button to display the
Configure Preset dialog on page 5938 , which
lets you change the resolution specified by the button.
Image Aspect Lets you set the aspect ratio of the image. Changing this value
changes the Height value to maintain the correct dimensions for the active
resolution. When you use a standard format rather than Custom, you can't
change the aspect ratio, and this control is replaced by a text display.
In 3ds Max, the Image Aspect value is always expressed as a multiplier value.
In written descriptions of film and video, often aspect ratio is also described
as a ratio. For example, 1.33333 (the default Custom aspect ratio) is often
expressed as 4:3. This is the standard aspect ratio for broadcast video (both
NTSC on page 7863 and PAL on page 7882 ) when letterboxing is not used.
(Letterboxing shows the full width of a wide-screen film format, framed by
black regions above and below.)
When using a custom output size, the lock button to the left of Image
Aspect locks the aspect ratio. When it is on, the Image Aspect spinner is
replaced by a label, and the Width and Height spinners are locked to each
other; adjusting one alters the other to maintain the aspect-ratio value. In
addition, when the aspect ratio is locked, altering the Pixel Aspect value alters
the Height value to maintain the aspect-ratio value.
NOTE In viewports, the camera's cone changes to reflect the image aspect ratio
you set in the Render Scene dialog. This change takes place when you exit the
Render Scene dialog.
Pixel Aspect Sets the aspect ratio of the pixels for display on another device.
The image might look squashed on your display but will display correctly on
the device with differently shaped pixels. If you use one of the standard formats
rather than Custom, you can't change the pixel aspect ratio and this control
is disabled.
5934 | Chapter 18 Rendering