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Track Motion problems in After Effects
I’m trying to add some blood in to a live action in After Effects. The blood is supposed to drip on the pants of an actor (the actor is moving).
I created the blood and I mask animated it, and it looks ok. The problem comes up when I have to make the blood moving tracking the pants of the actor.
What I did is create a null Object and track motion the movie file, then parents my blood to my null object. Which I guess is correct. But my blood looks too UNREALISTIC, it looks like it pops up on the screen. I tried to rotoscope the blood without the motion track but still it looks too unrealistic. I also tried all the different option of colors (trying to desaturated, off color set etc etc), but still it looks weird to look at. I actually playied with all the rotation in 3D, but still nothing.I really don’t know what to do. Is this something that After Effects can do with good result or I should just move to a 3D compositing program?
Is there something I’m missing? Is just that I’m not MOTION TRACKING correctly?
Hope some can help me.
Thanks
Alexandra -
5 Replies
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This tutorial can help:
https://www.videocopilot.net/tutorials/blood_splatter/Tudor “Ted” Jelescu
Senior VFX Artist
Bucharest, Romania
http://www.ennstudio.ro -
Thanks so much for your help and for responding back so quickly (I love Creative Cow).
For Ted: I already watched the Andrew Kramer Tutorial and I’m still having problem cause the track I have to do is slightly different from the one in the tutorial. I guess I can’t go further with the footage I got. Thanks Again for letting me know though. Really appreciate it.
For Dave: I totally agree with stock answer#2. Unfortunately (or I should say Fortunately) I wasn’t part of the production. I whish I was so I wouldn’t be struggling in front of the computer all day…lol.
I’ll try with a 3D compositing program and we’ll see what happen.
Thanks so much for asnwering back. -
If you need to tweak the blood in 3d space, you could try to do a 3d track (like Dave suggested) using Boujou or SynthEyes. Then distort the blood layer in 3d space using Freeform so that it matches the right surface/perspective. Use track data to position the distorted mesh on the person.
Tudor “Ted” Jelescu
Senior VFX Artist
Bucharest, Romania
http://www.ennstudio.ro -
For Ted: Thanks, I’ll definitely try that and let you know! Thanks so much.
For Dave: SO TRUE! Tganks for the tips!!
Alexandra
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For Ted: Thanks, I’ll definitely try that and let you know! Thanks so much.
For Dave: SO TRUE! Thanks for the tips!!
Alexandra
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