user1945: I am currently editing a clip in After Effects. We had a very limited supply of green screen so I am now having to edit some of the white wall too. The thing is, the actors move around, not allowing me to clip out these parts.
I was wondering if there was a thing in After Effects that allowed me to break up the clips so that I can work around the actors in certain time intervals and get the white wall to be transparent.
Thanks!

user1950: Have you used the Roto Brush? It was designed for situations like these.
For those unfamiliar, there is a nice concise tutorial here on how to use the Roto Brush.

1945: <p>I am currently editing a clip in After Effects. We had a very limited supply of green screen so I am now having to edit some of the white wall too. The thing is, the actors move around, not allowing me to clip out these parts.</p>

<p>I was wondering if there was a thing in After Effects that allowed me to break up the clips so that I can work around the actors in certain time intervals and get the white wall to be transparent.</p>

<p>Thanks!</p>
 1950: <p>Have you used the Roto Brush? It was designed for situations like these.</p>

<p>For those unfamiliar, there is a nice <a href="http://www.lafcpug.org/Tutorials/basic_ae_roto_brush_douglas.html" rel="nofollow">concise tutorial here</a> on how to use the Roto Brush.</p>
