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3D Layer problem

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Kew Lynne3D Layer problem
by on Dec 21, 2010 at 12:05:30 pm


I have always been having this problem but do not know how to solve it.

I have a footage of a dolly out shot of some buildings, 200 frames.
I drew a matte painting over frame 0, and its perfect.
Then I tracked the shot with pftrack, and its perfect.
I exported the camera to after effects, everything looks fine.
I placed my matte painting over frame 0.
To get the painting to follow i thought i should turn on 3D layer.

But once i did, the perspective got changed. I am having a hard time messing with the position, scale and rotation so it goes back to whhat it was like before i turned on 3D layer.

This thing always happens when i turn on 3D layer. Everything that i've positioned nicely gets skewed and goes into the 3D abyss. Usually i composite small objects, so i can just tweak the perspective manually. But this time its a HD matte paainting, i need it to be precisely how it is before i turned on 3D!

If anyone can teach me please, much appreciated!



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Tudor "Ted" JelescuRe: 3D Layer problem
by on Dec 21, 2010 at 5:26:35 pm

First problem I see is that you're trying to make a 2d plane do something a 3d object can do. Either you build a simple 3d set ( or better a 2.5 d matte painting) in AE and you use the camera exported from the track to shoot that, or you do it the old way, where you do a 2d track over the shot for position, rotation and scale and then you use a distortion plugin ( Mesh warp or bezier warp) to adjust the image.

Tudor "Ted" Jelescu
Senior Compositor/VFX Artist

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Kew LynneRe: 3D Layer problem
by on Dec 21, 2010 at 6:01:00 pm

Thanks Ted,

What you said makes perfect sense! I will reconsider the matte painting workflow.


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