Enable Track Matte After Effects

Go to layer new solid and use this to create a mask for the wheels or part of the footage you want to remove.

Enable track matte after effects. To apply a track matte to multiple layers first precompose the multiple layers and then apply the track matte to the precomposition layer. Within the duplicated or split layers the track matte layer remains on top of the fill layer. For example if your project contains layers a and b where a is the track matte and b the fill layer duplicating or splitting both of these. Connect your file to the null object.

After effects preserves the order of a layer and its track matte after you duplicate or split the layer. Both are simple to use but if you re new to the program working with track mattes might not be that obvious. Go to window tracker and connect the anchor point of the solid to the wheels. Blending modes preserve underlying transparency and track mattes trkmat should now all be available.

In the project pane that s in the lower left corner of after effects click and drag the spiral icon that s right of your file s name onto the null 1 title and then release your mouse. In the tracker panel click track motion. If you cannot see this column you may have to click on the toggle mode switches button at the bottom of the screen. A track matte only applies to the layer directly beneath it.

Between effects masking the new ish ability for effects to see down the stack and now this new effect matte and soon set matte compositions in ae are becoming a lot less cluttered than before. If the track mattes option is missing from your after effects timeline panel right click the section above your layers navigate to the columns menu and enable modes as seen below. Import those background and foreground clips into after effects. After effects preserves the order of a layer and its track matte after you duplicate or split the layer.

This process is called parenting and it will ensure that your file is motion tracked along with the null object. In this tutorial you ll learn how to use luma mattes and alpha mattes inside of after effects.