3d Projection (as in projecting on a real-world object)

[Adam Trachtenberg]

Very cool stuff. I don’t think there’s anything special to it, in theory. I’m sure the devil is in the details. You would need to create an accurate model of the object onto which you’ll be projecting and then set up the camera so that it matches the projector’s FOV, aspect ratio, distance, elevation, etc., etc. And of course create some interesting animation that track’s the object’s surface….

[Tim Shetz]

Digital Obscura here in San Francisco (and other cities) do quite a bit of this.

I’m not sure if they would be willing to share their methodology, but it doesn’t hurt to contact them:

https://www.obscuradigital.com/work/filter/tag/architectural-mapping/

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Tim Shetz
c4dtraining.com

[Jake Nelson-dooley]

Thanks very much for the responses guys!
-Jake

[Maxim Moisseev]

I’ve had some experience in doing this with c4d. With simple setups, like this:

or even this

we had no problem.
Just had to accurately reconstruct facade by dimensions, then did animations in C4D or Houdini, and rendered using camera with FOVequal to projector’s FOV.

Than placed projector in front of facade, at known distance, and used Catalyst media server to do little corrections. Finally rendered picture fits almost perfectly to facade elements.

BUT

when it comes to complex geometry, and different projection angles, I begin to get some problems. Like this:

Picture in photo camera and render camera in C4D are different from what we actually see by our eyes in reality. In particular, vertical lines are actually vertical, and not inclined. I have tried different camera modes and parameters – no one gives right image. Whene I project this image on the surface, I gete severe discrepancy that cannot be corrected by Catalyst geometry tool.

I suppose this is somehow related to c4d vanishing point setting that is different from reality. Right now i cannot get through this problem. Would appreciate any suggestions.

http://www.transscreen.ru – clear projection films and touchscreen.

[Maxim Moisseev]

UPDATE: found Shift camera in C4D Architecture presets. It seems to solve my problem making two-point perspective renders.

http://www.stagedesign.pro – video technologies and show lighting.