How to make 3d lighting affect live footage?

[NicNac]

Anybody have any ideas?

[scrimski]

There are several ways. the cheapest would be to add an additive glow from the explosion on the footage, another one could be rebuilding structures of the footage in the explosin scene and use the light and shadow passes in the footage. I'm quite sure there are more.

[Xion-Cajou]

It depends on the footage... really giving the illusion of interaction of 3d and 2d often
means you have to create some geometry that roughly represents the objects in the
2d environment and then render and composit the lightpass.
If this is too much work for your footage, simply altering the colors by filters etc.
can also give a good result. Hope this helps.

[Aneks]

two general concepts :

roto your subjects and use a bunch of animated /selective glows and colour corrects on the footage.

make 3d representations and use the to create shows and hi - light ares !

[Aneks]

Also you could use normal based relighting !
There used to be a demo movie somewhere about re-lighting using normal maps in the g-buffer on the combusiton 4 site but I cant find it. bascially the technique will work in any app that has a normal based lighting funtionality !

Like this but less simplistic :

http://www.digitalproducer.com/articles/viewarticle.jsp?id=32332

[altruizine]

if you're subjects are illuminated for only a few frames you may want to consider exporting those frames to stills and painting over them in photoshop to get the exact look of the lighting you want (paint in shadows too!). Then bring your paint layers back into you compositing app and lay them in over the footage.

in the end, this may be your fastest, most customizable method - getting you to your exact look right away.

-JF

[CGTalk Moderation]

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.