You can make all pixels
of a specific color in a grayscale or color image transparent. (The
transparency color of a bitonal image is always the background color
of the image.) This is useful for overlaying two images or placing
an image in front of objects.
option does not affect images you added with Data
. If the image you are inserting is supported
, connect to it and add it to your map using Data
. This gives you more control over styling
and other options.
This option is not available
if the image is currently unloaded or if the Raster Extension is
not loaded. To load the Raster Extension,
use an image command, such as Insert An Image.
transparency color is stored in the drawing as an AutoCAD Map 3D custom
object. If you send the drawing to other users, they can see the
transparency color only by opening the drawing in AutoCAD Map 3D or Autodesk
Raster Design. If they open the drawing in AutoCAD, they
see a message that AutoCAD cannot reference the custom object and
will not display the transparent color.
You can also change the
opacity of an entire raster image, so that the image is translucent
and items below it are visible.