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Major chromanator problem with a deadline.

Posted: Fri, 5th Aug 2005, 5:23am

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geigel1

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Hello

In response I have included links to my footage which I hope will explain my problem.

Basically you will have two guys wrestling in a ring..but they will move from one corner to the other so the background would have to match with the closeups of just one side. Please see the attached as you will see the corner problem as there will be straight on shots with both sides so how to do this. Have uploaded the scenery I wanted to use which obviously doesnt wont work..but I dont think you can have two different backgrounds meet in the corner? Any suggestions...also please review and answer my spill supression question. Thank you.

http://img169.imageshack.us/img169/3058/chromaproblem8hz.png

background

http://img169.imageshack.us/img169/1664/028do1.jpg

Any ideas?????
Posted: Fri, 5th Aug 2005, 6:37am

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Redhawksrymmer

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SuperUser

You could try animating the background, zoom in and move it to different places which fits together where the camera is placed. You could also have more pictures to choose from, from different angles.
Posted: Fri, 5th Aug 2005, 10:44am

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Simon K Jones

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FXhome Team Member

The problem is that every element in a composite needs to be created with the final shot in mind. If you have different elements that have completely different angles/perspectives, you're going to have difficulty. Do you have the possibility of reshooting the background plate so that you can get the right angles? That would be the easiest solution.

Alternatively, you can cheat slightly be warping the background shot. This can be used to approximate the correct look, and depending on the shot it might work fine:


(click to enlarge)

Here's what the comped shot looks like:



It's not perfect, but it might pass depending what you want the shot to do. Ideally, however, you want to try and get all your elements to match up in the first place, it makes things much easier.
Posted: Fri, 5th Aug 2005, 3:12pm

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geigel1

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Tarn

Wow thats good. It will help. I have more backgrounds so choose from but I just pulled that out one to demonstrate.

So it would be next to impossible to use any of the lengthly shots because they would be moving from one part to the other...example..they would be on the ropes where you see the wrestler walking from and continue on the ropes from where the wrestler is walking to.

I unfortunately have to work with what I have as it was expensive to film and we hung 20 foot greenscreens from scaffolds and we were more worried at the time about getting good wrestling action, keeping the fabric greenscreens from moving and nobody falling off the scaffolds.
Posted: Fri, 5th Aug 2005, 3:15pm

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Simon K Jones

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FXhome Team Member

You might be able to animate the background to match the foreground, it's hard to say without seeing an actual clip. This is why so many films/TV shows always lock down the camera when shooting effects - until very recently it was hard match movements without using motion control cameras of some sort.
Posted: Fri, 5th Aug 2005, 3:39pm

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geigel1

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Tarn

Thank..I can send you a clip..please advise how....
Posted: Fri, 5th Aug 2005, 3:40pm

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Simon K Jones

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FXhome Team Member

Upload the clip somewhere if possible (then everyone can have a look and offer advice...if that's what you want, of course). Otherwise email the link or the file itself to team@fxhome.com. As we'll need a few seconds to see how the movement works, you'll probably need to compress the file using divx or similar.
Posted: Tue, 9th Aug 2005, 12:13pm

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Arktic

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I'm not sure, but have you thought about using a 3D program?

What you'd need to do is create a cube, and texture the insides with images of the location you want. Then you need to animate the 3D camera to follow the action of the camera on the greenscreen.

Then it's just a case of rendering out the 3D animation, and compositing the shots together in chromy.

I hope that makes sense to you.

Cheers,
Arktic.
Posted: Wed, 10th Aug 2005, 12:34am

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geigel1

Force: 1200 | Joined: 25th Feb 2003 | Posts: 62

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Thanks for the reply.

Could you list a more detailed step by step in whatever 3d software you use.

Thank you sooooo much.