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Prevent shadow from going off an edge?

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Andrew VincentPrevent shadow from going off an edge?
by on Dec 22, 2011 at 4:30:49 am

Hi! Could someone explain how I would prevent a shadow from going off a table, for example, on actual, tracked footage? I'm very new to Cinema 4D..and 3D animation in general. I tracked footage of a table and the ground underneath, and tried putting some text on the table. It tracked perfectly, and I added some lights to make it look a little bit more realistic. The text cast a shadow, which was what I wanted, but it went past the boundaries of the table, and it appeared to be floating at that point.

How would I cut off the shadow at the edge of the table so it looks real? I was using a light, and a floor with a compositing tag if anyone needs to know. Thank you!

Here is what I have right now:

I put extremely subtle shadows so you couldn't see it going off the table.

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Adam TrachtenbergRe: Prevent shadow from going off an edge?
by on Dec 22, 2011 at 5:57:55 am

You need to create a planar object in the shape/position of the table top and give it a compositing tag. Check the tag's "compositinig background" box. Then place your footage in a material and drop it on the object. Set the texture tag's projection to frontal. That should do it.

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