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.
Re: A very simple masking question by Darby Edelen on Feb 26, 2008 at 6:37:07 pm
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
Re: A very simple masking question by Jeremy Allen on Feb 27, 2008 at 12:36:41 am
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..
Re: A very simple masking question by Darby Edelen on Feb 27, 2008 at 10:20:46 pm
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
Re: A very simple masking question by Darby Edelen on Feb 29, 2008 at 1:17:11 am
[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
