Hmm, can you be a bit more specific? Are you trying to recreate a depth of field or some kind of perspective effect?
Are you rendering RLA files out of Maya? Also, be sure z-depth is selected on the cameras you're rendering from, sometimes it's the little things.
On the AE side, the 3d channel extract is pretty good for gleaning z depth info from RLAs, but i prefer creating my own luma mattes from light fog, or a spotlight on white materials in Maya.
Yes, I'm trying to get a successfull Depth Matt and Depth of Field in AE with Maya renders. The problem I keep running into is that the Z channel from Maya is totally jagged and AE also doesn't interperate the data correctly: I have to alter the 3D-Effect values in tiny increments.
So I have in the past attached a Ramp shader to a camera and that works pretty good, but how could you use that as an accurate Depth matt?
Damn. I wish the actual Z channel was of a better quality.
Any help will do.
Thanks a lot.
Yea, the z-depth info, unfortunately, isn't aliased and at a low bit. I'll admit I've had to make do; sometimes a gaussian bandaid was used >.<
You can create a 'dof' luma pass using a black/dark environment fog and applying a white material to all of the objects in the scene.. The best part is the control you have over the saturation level (the level of black) to the camera, and that obviously coincides with the blur intensity . The bestest part is the quality of the resolution is up to you.
Apply AE lens blur to your RGB+ movie, and then just set the depth map layer to the luma pass.