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Scorch marks staying in place [ANSWER]

Posted: Thu, 5th Apr 2007, 12:02am

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Dark Pivot

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How do I get a still image of a scorch mark to stay in the same spot (On the wall) While the camera moves? Whenever it moves I try to move the mark in place it is supposed to be on and when I play it it looks like it's moving across the wall. Will someone tell me how to keep it on the same spot?
Posted: Thu, 5th Apr 2007, 1:07am

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Axeman

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Well, there is software that will do motion tracking for you, but it is typically only found in high-end packages, like After Effects Pro. Typically though, you will want to place a marker of some sort on the wall while you are filming, then you will have it for reference to get the placement of the scorch mark, or whatever effect you add, more accurate.

As an option, I did just become aware of a very reasonably priced motion tracking program called Magnet, available from Ex-Cinder. I've not tried it yet personally, but you may want to check it out. EDIT: I see you are on Windows, and Magnet is Mac-only.

Last edited Thu, 5th Apr 2007, 1:09am; edited 1 times in total.

Posted: Thu, 5th Apr 2007, 1:08am

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petet2

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If you move it frame by frame it you should be able to make it appear to be fixed to one part of the wall. It is going to be a tricky job though if you have a lot of camera movement as any slight discrepancy will make the scorch mark appear to drift.
Posted: Thu, 5th Apr 2007, 12:50pm

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Jabooza

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Yeah, it is quite hard to animate things like this without making them look cheesy. When I’m doing it, sometimes I find something behind what I'm animating that the effect happens to line up with and follow that around, of course you can really only do this if the wall has texture of some kind on it.
When animating it, be sure not to move it faster than the camera moves and after every keyframe or two go backwards and see if you did it right.
This probably sounds pretty tedious but keep working at it and I'm sure it'll come out good, I’ve done things like this that look like I motion captured it when I'm done, so it is possible to get good results.
Posted: Sat, 7th Apr 2007, 12:02am

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Dark Pivot

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ok, thanks. I got it working now.
Posted: Sun, 15th Apr 2007, 4:27pm

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Merrick

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If you've got a lot of camera movement, I think you should put some kind of marker on the wall to refer to.
Posted: Mon, 16th Apr 2007, 8:27am

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Ballowall

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Even if you have alot of camera movement its extremely simple (if a little time consuming) to place the edge of the quad over any still landmark (something you can see easily-like a marker!) and just do that. I did that in a film to keep fire and explosions in place and it turned out amazing!

Check it out if you want http://www.youtube.com/watch?v=KJGOmFGhWT0
Posted: Mon, 16th Apr 2007, 2:30pm

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Jabooza

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I did it in this short film a couple of times neer the end and it turned out pretty good.
Posted: Mon, 16th Apr 2007, 6:28pm

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Mandalorian

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Search for Icarus. It's a motion tracker and they have a free, non-commercial version that you can download. It works very well.

There's some stuff on it http://www.peerlessproductions.com/tuts.html