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Masking in 3D space
Is there a way to add a 3D mask? I have a cube made up of 6 solids, and I want to do a camera move on it, but also mask part of it out. This is part of a 3D Graph I am trying to create, and I want the bar (cube) to move up along the y axis, but I can’t figure out how to do that with out seeing it below the “floor”. Here’s a picture:
Does this make sense?
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4 Replies
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It sounds like you just need to move your anchor point to the bottom of the cube.
Andrew VanWickler
vanwyklr@3dvw.com
https://www.3dvw.com -
If you pre-compose your cube and place the bottom of it at the center of the pre-comp then you should be able to collapse transformations on that comp in your main composition and scale the cube on the Y-axis to make it grow.
Darby Edelen
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I have tried that, but it only works if I don’t move the comp camera. The track matte is only cutting a 2D hole, so it looks weird if I do a camera move.
Here is a copy of my .mov file. I tried moving the anchor point, but it didn’t help with the masking. Right now it is just a positional move up on the y-axis to make the bars grow. They are a 3D pre-comp.
I would like to not have to keyframe scale if possible, as all of my other calculations are done based on y position.
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Thanks for your reply. I know keyframing the y-scale would work, but I want to remain flexible. It would work now, because it’s just a solid color for the 3D bar, but in case my clients want to add graphics or textures to the bars – I don’t want them to be stretched.
Do you have any other ideas?
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