I'm interested in integrating motion capture technology to animate only my face in 3D, while keeping my real body and the background in view. Additionally, it's crucial for me to interact with real-world objects, like instruments, in a way that they can occlude the animated face, appearing in front of it as needed. Can iClone with AccuFace (and CC4?) provide this functionality in both live scenarios and pre-recorded videos? Ideally, I'm looking for a solution that functions similarly to a Snapchat filter but offers more advanced capabilities.

IClone uses 3d cameras from IPhones or Nvidia RTX-based face recognition. As far as I have read it in the forum, the recognition has already problems if the captured person has a beard. Then it cannot recognize mouth movements correctly. So I don't think you can cover the face in any way.

Both technologies also need to have the face captured in close-ups, like sitting in front of a webcam or holding the iPhone in front of the face to unlock its screen.

I believe Snapchat only recognizes basic facial features like edges from eyes and mouth and layers a 2d image or a basic 3d model on them which is then distorted by the movement of the recorded person. 3D animation needs much more information for face capture so it's not as easy.

Both Accuface and the iPhone thingee (sorry, don't remember right at the moment and WAY too lazy to boot up my machine) don't have problems with beards or glasses, and "sort of" ignore things in front of the mouth (it will interfere with capture accuracy but it's pretty acceptable).

But I'm not sure if Real-Time will work well for you - however, since there are free demos of both of the plugins why don't you just try it yourself to see?

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

I am trying out accuface, but as far as I can tell it can't just animate a face only overtop of my body. And if it does, I can't find any tutorials on how to do it. 

You could animate it on top of your body (by hiding the body of the second figure - easy-peasy) but as to how you're going to keep that animated head "attached" to your real body behind it I would have NO idea (simple to do it in post, but to do it live would require $$$ - a mocap suit would be ideal).  If you are going to keep your real body rigid and unmoving then, sure, again easy to do but I'm guessing you want something like a snapchat filter (or whatever the heck the kids do nowadays to make their faces look like cats and other stuff).

That is NOT the purpose of iClone or the RL world.

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Alienware Aurora R16, Win 11, i9-149000KF, 3.20GHz CPU, 64GB RAM, RTX 4090 (24GB), Samsung 870 Pro 8TB, Gen3 MVNe M-2 SSD, 4TBx2, 39" Alienware Widescreen Monitor
Mike "ex-genius" Kelley

RAG DOLL COLLISION ANIMATIONS FOR ICLONE 8 & 7
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Ghost Origins

My latest Feature length film created with Iclone.

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Ohh yeah, I have snap camera. Snapchat got rid of it, luckily a github project has preserved some of it.