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ADOBE ILLUSTRATOR CS2
User Guide
Background Determines how transparent areas of the vector graphic are converted to pixels. Select White to fill
transparent areas with white pixels, or select Transparent to make the background transparent. If you select Trans-
parent, you create an alpha channel (for all images except 1-bit images). The alpha channel is retained if the artwork
is exported into Photoshop. (This option anti-aliases better than the Create Clipping Mask option.)
Anti-alias Applies anti-aliasing to reduce the appearance of jagged edges in the rasterized image. When setting
rasterization options for a document, deselect this option to maintain the crispness of fine lines and small text.
When rasterizing a vector object, select None to apply no anti-aliasing and maintain the hard edges of line art when
it is rasterized. Select Art Optimized to apply anti-aliasing that is best suited to artwork without type. Select Type
Optimized to apply anti-aliasing that is best suited to type.
Create Clipping Mask Creates a mask that makes the background of the rasterized image appear transparent. You do
not need to create a clipping mask if you selected Transparent for Background.
Add Around Object Adds the specified number of pixels around the rasterized image.
See also
“About raster effects” on page 424
“To rasterize a vector object” on page 437
“About image resolution” on page 329
Applying filters and effects to bitmap images
Filters and effects let you apply a special look to bitmap images as well as vector objects. For example, you can apply
an impressionistic or mosaic look, apply lighting changes, distort images, and produce many other interesting
visual effects.
Consider the following information when applying filters or effects specifically to bitmap objects:
• Filters and effects don’t work on linked bitmap objects. If you apply a filter or effect to a linked bitmap, it is applied
to an embedded copy of the bitmap instead of to the original. To apply the filter or effect to the original, you can
embed the bitmap in the document.
• Adobe Illustrator supports plug-in filters and effects from Adobe products such as Adobe Photoshop and from
non-Adobe software developers. Once installed, most plug-in filters and effects appear in the Filter and Effect
menus and work the same way as do built-in filters and effects.
• Some filters and effects can be memory intensive, especially when applied to a high-resolution bitmap image.
See also
“About linked and embedded artwork” on page 325
“About plug-in modules” on page 46
Improving performance for filters and effects
Some filters and effects are very memory intensive. The following techniques can help improve performance when
applying these filters and effects:
• Select the Preview option in filter or effect dialog boxes to save time and prevent unintended results.
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