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Opacity Masks in Illustrator CSUsing images and objects to define transparency in text Image masks
But what if, instead of compositing my transparent text over an object, I want to composite the image within my text and use the image's luminance values to define my text's transparency? Not a problem.
Just to make things easier for yourself, begin by positioning your text over the image you wish to use for the image mask.
Then select your image, and copy it. (You can also cut it, if you don't plan to use the image elsewhere in your composition.)
Select your text object once again, and, if you haven't already, create a new opacity mask for it, just as before.
Then select the opacity mask, and choose Edit > Paste in Front (Command-F on the Mac/Control-F on Windows) to paste it in place so that it doesn't get lost on your canvas. Move the image around to make it fit better into your text, and, once again, voila!
Related Keywords:adobe illustrator, illustrator cs, opacity masks, masks, layer masks
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