Applying filters to image masks – Apple Motion 4 User Manual
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With the image mask selected, do one of the following:
• Open the Image Mask tab in the Inspector, then drag the layer you want to use as the
mask into the Mask Source well.
Mask Source well
• Drag the layer you want to use as the mask into the Mask Source well in the HUD.
Important:
Be sure to click and drag in one movement to successfully drop a layer in
an image well. If you select the layer to use as the source, then release the mouse
button, you lose the selection.
In this example, text is used as the mask layer.
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Choose the channel you want to use to create transparency from the Source Channel
pop-up menu, as well as any other options that are necessary to create the required
transparency.
Applying Filters to Image Masks
Like shape masks, you can add filters to image masks to further manipulate the
transparency effect. In particular, you may be able to improve the mask that’s created by
using color correction filters such as Brightness, Contrast, and Gamma to manipulate the
contrast of the mask, pulling out or reducing detail to create the transparency effect you
need.
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Chapter 17
Using Shapes, Masks, and Paint Strokes