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I am compositing a model into a video, in which a mesh circles around an element that is depicted in the video.

Since there is a little bit of movement, it would be better to block the obscured half with an invisible object than to just cut the mesh, but I am not finding a way to do this elegantly.

Is there a way to approach the problem this way? An object that basically makes anything behind its silhouette transparent? Or is there a better way to approach?

tamago
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    Two basic ways to do it, one with a mesh that uses a holdout material, effectively creating an alpha channel. Or with a mask that you can use in the compositor. The second option can also be used in conjunction with trackers to automate motion, as in rotoscoping. – susu Dec 30 '20 at 08:00
  • Perfect, thank you @susu – tamago Dec 30 '20 at 20:53
  • https://blender.stackexchange.com/questions/117572/how-to-put-a-mask-into-3d-space – susu Dec 30 '20 at 21:06
  • https://blender.stackexchange.com/questions/183081/how-to-have-person-in-video-mask-added-geometry-as-they-walk-in-front/183108#183108 – susu Dec 30 '20 at 21:09

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