strange grey outline on my track mattes

[Ridley Walker]

Try using a the matte choker effect.

[Cassius Marques]

What color is the “animation” footage? that grey line seems to be there because there is another instance of the alpha source under the matted solid.

[John Damiani]

yes, one of the animation layers is underneath the black solid layer without any masking applied to it at all, that’s were the outline is coming from, but im moving a shadow across the scene, so i need the layer there for the effect…

also the reason i am using 3d is because i panned the camera at an unusual angle, and i wanted the wings to have some depth without keyframing it too much, once it became a 2d scene i just kept the 3d layers so that i could cut the scene up without all parts getting all wonky

i did find a solution, i used the set matte effect instead, but i still kinda like using track mattes, so i wouldn’t mind getting a solution for using that method still. but at least its not “omg nothing working” bad anymore.

oh also the original footage is white

[Cassius Marques]

You were using that layer to cast a 3d shadow? you can set it to cast shadows only and make that line go away. Most 2d shadow effects have that option also.