Inverting Masks In the snapshot below, we have drawn a mask using the Pen tool. In this case though, I have simply advanced the timeline 5 seconds and shrunk the mask to one corner, and created the second keyframe. And I'm going to start dragging and things will appear here inside this mask. The determination of what features of other layers are nearest to the snapping point is made in screen space i. And so where is that darn area again? And these features are not available inside, let's say, the mask properties.
Bezier shape paths are defined by a collection of vertices path points and segments that you can modify in the Composition panel. You may need to use the Hand tool to reposition the view in the panel. And we're going to click here in a second. In the Duration dropdown menu, choose Constant. So some people work in this way.
The next keyframe is created in the same manner, here I have advanced the time cursor and moved the mask upwards to the right of the text. The track matte here is stationary. Here is the before: Explaining Expressions Before we go any further in this section, it is important that you understand what expressions are, as well as their purpose in After Effects. This tutorial by Mylenium will show you how to create a fully animatable diagram with a few expressions and some thinking around the corner. Now, it's funny that I said screen,…because if you look at the Blend modes, that's what our top 4 layers are set to. This is happening, because this Render checkbox is unchecked.
So that's what inverted means. Whilst many try and jump in at the deep end with all the advanced techniques, it is important to have a good understanding of the underlying processes and how they interact to be successful in the long term. Next, select a shape tool from the Tools panel, such as the Rectangle tool, and drag to draw the shape on your composition, as shown below. This will use the white shape in the layer above to mask off the layer. It can't compete with the advanced particle emitters of a dedicated 3D app, but it is sure to be useful in some instances, where the lack of time or high end 3D tools required for a fully realistic tornado are not available.
Alt+Click on the area that you want to clone. We have circled the pick whip icon below. That means when you click on these guys you're going to move the entire mask around, not a point, like that. If you are new to After Effects, pre-composing layers might seem like a step that you do not need to take because it only takes up time. This is related to path direction and how transformations are stored. After you place your last point, click on the first point to connect them and close the path. This area here will be entirely opaque, because it's protected by the mask.
So only what's inside the mask will be visible on that top layer, the light-graphics layer. Part Three shows how to mask the emitter layer in an After Effects composition, so that the emitter appears to be placed properly in the scene relative to the other video elements. Here you can move the mask, change its size and rotate it. And if you have multiple masks in one layer, sometimes it's good to have different colors for each of those little borders. As you make the mask you can't see it. This effect will work with any layer. And we've made this second mask.
When you create a track matte, one layer in the composition acts as the matte. However, you can also create masks with curved lines using Bezier curves. And if you want to create a mask that fills the image then you can use a mouse shortcut to do that. Replacing What's Inside a Mask There are several reasons to create masks. About track mattes and traveling mattes When you want one layer to show through a hole in another layer, set up a track matte. Notice how you get the Rotation tools. Then select your desired layer and hit Command+V to paste.
And I won't have to worry about this thing disappearing as I work with it. You can also work with masks inside the Layer panel. Within the duplicated or split layers, the track matte layer remains on top of the fill layer. You can switch between the Tool options by using the shortcut Q. So I'm going to go get my Shape tool, get my Rounded Rectangle. Moving the text will move the mask along with it.