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Moving Mat Issue
Hello Cow Crew,
I am having a minor problem that is turning into a major issue. I am working on a moving shot that dollies in and pans over to the action. It is an exterior shot and is night. I have created a moving mat that I have been using to have some Motion made train smoke appear as if it is traveling behind the building. As well, I replaced the sky with a moon that I have had to track to the shot.
Everything has been going well except for the fact that a portion of the mat seems to bounce a little bit against a portion of the building, not much, but enough to ruin the effect. I have tried going over that section but it seems very hard to fix.
My question is…is there a better way to to do this effect? For instance, some kind of garbage mat where I could use color key to key out the sky or create a mat from. I’m sure if I try to key out the sky without some sort of boundary I’ll pick up a lot of blacks from the building.
This is one of those instances where I have come too far to turn around. Meaning that I have already put many hours into this and feel that I am close, but don’t know how to proceed.
Any suggestions would be greatly appreciated. I am on Motion 3.
Peace and thanks…Ian
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25 Replies
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Really hard to help without seeing the shot- can you upload to Vimeo or something please?
Noah
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Will do. I’ll post after it’s up. Thanks…Ian
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Hi Noah,
Here’s a link…. https://triadproductions.us/TempVideo/TrainBy2a
The effects aren’t finished or the moon, but you can see toward the toward the top right side of the building where most of the problem is. The mat isn’t tracked all the way yet either. Thanks…Ian
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Can you post the original shot, too?
Arnie
Post production is not an afterthought!
https://www.arniepix.com/ -
Basically you’re trying to do a 3D shot in a 2D app. To that shot justice you’d track it in Syntheyes and make a 3D version of the smoke in a 3D app like LightWave or Cinema 4D. Then comp that properly 3D tracked element back into Motion. As it is now you’d really need to frame by frame keyframe that element to match the z movement. It doesn’t help that the original shot is a bit wobbly. I’d wash that through a bit of stabilization first.
Noah
Check out my book: RED: The Ultimate Guide to Using the Revolutionary Camera!
Unlock the secrets of 24p, HD and Final Cut Studio with Call Box Training. Featuring the Sony EX1 Guidebook, Panasonic HVX200, Canon EOS 5D Mark II and Canon 7D.
Watch Formosa- My indie movie shot with the SDX900 and finished with Final Cut Studio. -
Have you tried the track points filter?
Andy
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I did run in through some stabilization, but then though better of it. I thought it might be better to do at the end.
No, I haven’t tried the track points filter. Thanks… I’ll check that out.
So there is no way to key out the sky?
Basically you are telling me that I have to start from scratch?
Thanks for the responses…Ian
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PS I am not really worried about the smoke. I feel like I can get that to play. It is far from finished. It is only the mat moving that is bothering me….
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[sean lloyd] “So there is no way to key out the sky? “
You never posted the original shot. Nobody here has seen the original sky but you.
Arnie
Post production is not an afterthought!
https://www.arniepix.com/ -
Hi Arnie,
Am doing that right now…I
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