Alpha Channel Problems

[quad]

Hi guys

My Problem is my alpha channel in ae.
When i comp some 2 layers over i see everytime black borders...
http://i.imgur.com/p0okE.jpg



in nuke i have the alpha option with merge...
http://i.imgur.com/qdi4e.jpg

any ideas for the same solution in AE?

regards quad

[dan]

Hi quad! Welcome to the DT community! Well, you asked how to use the alpha channel of one layer as another, and you could do that with a track matte, but looking at your screenshots it looks like you have a premultiply issue going on, so using track mattes isn’t necessarily the best route to take for that. Here’s a quick video that shows some ways you can resolve that. Hope it helps!


30695382

Here's a link to the Visual Guide to Premultiply (http://www.digitaltutors.com/11/training.php?vid=219) tutorial that was referenced in the video.