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If you want a stroked path, a shape layer is going to be more efficient in almost every way than adding the Stroke effect to a mask. It works perfectly except that the stroke has a round cap and doesnt look good when revealing the logo beneath it. I pressed generate stroke and am using paint on original using the background colour to reveal my logo (two letters). You can specify a particular property as we have above, or use a value of all to refer to transition properties. You can create a mask on a shape layer but you have to pay close attention to the Tool Bar and make sure Mask and not Path is selected. I am making a logo reveal by using a mask. Notice, too, that we told the browser that the transition should take two seconds and follow and ease-out timing function, which means the transition starts fast, then slows down towards the end. Rotoscoping in After Effects is mostly a matter of drawing masks, animating the mask path, and then using these masks to define a matte. After creating the segmentation boundary, use Refine Matte properties to improve the matte. That tells the browser that we’re planning to transition background colors and nothing else when a transition occurs between hovered and non-hovered states. After Effects uses that information to create a segmentation boundary between the foreground and background elements. How can I cut out holes in the frames but then deactivate the second mask again some frames later Do I have to clip my clip for each frame now You can animate Mask Opacity. Notice that we’ve called out the background-color property in the transition declaration. I have a shape that I want to cut out with a mask and I have some unwanted parts in some frames that I like to cut out as well. CodePen Embed Fallback Specifying which properties to transition