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QUESTION: Retaining/creating shadows when compositing

Posted: Thu, 15th Apr 2004, 7:45pm

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Brenton

Force: 700 | Joined: 26th Dec 2003 | Posts: 6

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Does anyone know how to insert shadows under people after they have been filmed on a greenscreen? It looks really fake if there is no shadow under the person in the environment because Chromanator takes the shadow (which is part of the green) out. Is there a way to put a shadow there?
Posted: Thu, 15th Apr 2004, 7:51pm

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Brettsta

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Rating: +1

Copy and paste the footage after its greenscreened. Grade it dark, angle it depending where the lights at. Set the transparency and blur to look how you want it to. Make sure it is in a layer underneath your actual footage.
Posted: Thu, 15th Apr 2004, 8:31pm

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MarkB

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Is that how the demo pic was done on the front page of the Chromanator site? The little one with the guy standing on Mars or Tatooine or wherever and there is a shadow on the ground..

That technique seems like it wouldn't work very well unless you had a simple ground under the object, any kind of wall or object wouldn't let the shadow flow correctly

Mark
Posted: Thu, 15th Apr 2004, 8:59pm

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Brettsta

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it works good. The ground gives the illusion of it rolling on it kinda, as long as you add transparency. Not sure if thats how it was done in that pic. One of the csb guys will have to get to you on that.
Posted: Thu, 15th Apr 2004, 10:38pm

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Gibs

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They probably used a displacement map on the shadow layer in a program like AE. However, that might be something to suggest as an update for a future version of Chromanator. smile
Posted: Thu, 15th Apr 2004, 10:42pm

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Brettsta

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Whats a displacement map?
Posted: Fri, 16th Apr 2004, 12:12am

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AndrewtheActorMan

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it uses a map to make the foreground layer react to something in the background...i guess..IE: if you have some text and some water video. Using the displacement map you can make the text flow along with the water..

Andrew biggrin
Posted: Fri, 16th Apr 2004, 3:06am

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Gibs

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Yeah, sort of like this.

(I faded around the edge of the text to show what the original layer looks like)