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A very simple masking question
This seems really easy to do but I can’t, for the life of me, remember how to do it.
I have three 3D layers:
1: frame
2: Talent
3: BG
I have a 3D camera that slowly rotates by the frame.I want the frame to conceal talent and bg near the edges.
I can’t remember how to make the frame a mask. I don’t want to animate a mask on the BG to keep them from popping out from behind the frame. That doesn’t seem necessary.
Could some one jog my memory here?
Thanks.
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7 Replies
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I’m not quite clear on what you’re trying to accomplish. Are you just trying to create a frame with a mask or are you trying to limit the lower layers to the ‘frame’ defined by the upper layer?
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
Search the AE help for Track Matte?
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I want the frame to conceal everything behind it except for the BG, as the camera rotates around.
“The secret to creativity is knowing how to hide your sources.” –Albert Einstein
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So you want the 3d layers to show through the frame, like a picture? I can think of a couple different ways..
1. mask each layer individually with a layer mask.
2. place the “bg” layer between the frame and 3d layers, using a mask set to subtract to act as a hole in the background. Does that make sense? If only the camera is moving and not the layers, that should work.. -
Pre-comp your 3D layers, enable collapse transformations on the pre-comp then use your frame (or another solid layer) as an alpha track matte for the pre-comp.
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA -
Yeah, that’s what I thought Darby. I just couldn’t get it to look right.
“The secret to creativity is knowing how to hide your sources.” –Albert Einstein
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[malcolm man] “Yeah, that’s what I thought Darby. I just couldn’t get it to look right. “
I’m still not sure I know exactly what you want it to look like. The technique I described could be used to do a sort of a “Through the Looking Glass” effect where there appears to be a 3D space contained on/inside a 2D plane.
Darby Edelen
Designer
Left Coast Digital
Santa Cruz, CA
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