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Opacity Falloff/Gradient Effect?

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Matt JonesOpacity Falloff/Gradient Effect?
by on Jul 31, 2008 at 4:16:23 pm

Hey Guys,

Racking my brain for a way to have the opacity on an object, say a rectangle, "fall off" from the top to the bottom of the rectangle. So, in other words, the top of the rectangle is at 100% opacity, and the bottom is at 20% opacity, with the areas in the middle falling off gradually like a gradient. Any ideas?

- Matt


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Mark SpencerRe: Opacity Falloff/Gradient Effect?
by on Jul 31, 2008 at 6:00:38 pm

Sure - use an image mask. First, create a shape and fill it with a black and white gradient running vertically. The, select your rectangle, and choose Object > Add Image Mask. Drag the gradient to the well in the HUD (or even directly onto the image mask in the Layers tab). Set it to Luminance. Adjust the gradient to taste using the interactive gradient tool in the Canvas.

--
Mark Spencer
Freelance Editor/Producer
Apple-certified instructor, FCP, DVDSP and Motion
Author, Motion Visual Quickstart Guide from Peachpit Press
http://www.applemotion.net


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