Hello, this is my first post.

I am working on some stuff that was shot on a greenscreen. I have motion tracked the footage but am having a problem getting rid of the tracking points on the walls (what looks to be masking tape, very white).

I am working in After Effects and have used keylight to get rid of the green then did an autotrace for the masking. When I do the autotrace it puts a mask around the performer and a mask around every white X on the walls.

I've tried to delete the masks that I don't need (all except the performer) but it looks like autotrace changes the numbering of masks as it goes through time. I am guessing when the performer moves in front of an X then the number of masks on screen changes and the resulting numbering sequence gets all gimpy.

So i guess I am looking for some guidance on how to get rid of the white tracking markers that were on the greenscreen wall. Or more specifically where in the After Effects workflow I have gone wrong.

Thanks

Darren

Increase the number of pixels that the auto-trace uses as it minimum area. I forget that actual name of the field in the dialog box for that, but my guess is that you left it set at 0. Increase that to maybe 10 to 50 pixels, and "test" it.

Do you have real estate to create a garbage matte?? That might help a bit..

Another thought: if you've keyed the footage, the tracking marks should already be gone. Perhaps you need to increase the 'strength' of the key, to pull the trackers out. Or you may do well to use //two// keylight effects, the first to pull out the trackers only, set the result display ("final result" is the default, "status" will show the Alpha mask...) to "Intermediate Result," (which shuts off keylight's color correction routines) then use a second keylight effect to pull the screen out, and set that to "final result." Then you'll be able to trace the foreground only.