[Roman Holtwick]

I do have Element 3D!
But never used it for something like this.
How would you go about it? I only experimented with text in AE itself yet.

Also make sure to read the answer I posted to Steve above since there seems to be some major misunderstandings in what I want to do.

Thanks! 🙂

[Roman Holtwick]

Thanks for giving a rel answer! You are (in parts) getting me right.
Let me elaborate (beacause I think it is actually A LOT easier than it seems):

Yes I am going for stills with this projekt, it‘s going to be long time exposures of 10+ seconds with a lot of different light painting techniques.

Neither I nor the app did bind the shown cross section to the motion sensor.
The app creates a video with a set length, say 10 seconds, in which it goes through all the cross sections of the text or object you like to generate.
This means you have to set your DSLR on a tripod and expose the picture for at least 10 seconds in which you habe to move the phone through the picture where you want the text or object to appear.
If you move it too slow the text will appear shorter, if you move it too fast it will appear longer.
I have tested this manually by making a circle in AE slowly growing bigger and then shrinking back to a dot, and putting the Render on my phone as a video (5sec.) and dragging it through a long exposure of 7 seconds to have enough time to start it and move it.
It resulted in pretty good spheres.
Now since I could do all of this in CG or Photoshop easily in said blending modes I want to do it as a practical effect for demonstration/education purposes, even if that means doing more complex stuff by hand.

But I would love to reverse engineer the sphere-example from above in such a way that I could load a sphere in AE and get it to render out cross sections of said sphere in such a way that it becomes a growing and shrinking circle. I could then use the same method on more complex objects like text, a car a skull or whatever…

In other words, forget all the above and tell me the simplest way to get AE/Element 3D/C4D to only show the one slice of an object that interferes with a set plane.
That would perfectly do the trick! 🙂

[Roman Holtwick]

Well this is why I asked for some expertise…
However replicating this in CGI would be really easy, I’d still love to do it as a practical effect.
I think I will do it by hand…

[Roman Holtwick]

Can you elaborate on that? Of course you COULD do all this by hand but this would be a lot of trial and error and not really productive…

In case the first video was misleading here is an example of how the app was used back when it still worked:

https://www.youtube.com/watch?v=qDFgbUBrKLI

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[Roman Holtwick]

I think this is specific to the codec, try some settings! h.246 won’t let you do that, but others should work. I recently had the same problem while making a 360° video.