What object buffer? What does "screwed up" mean? Screenshots? Render settings? Compositing Tag settings? You need to be more specific.
Here a little more content:
I have tracked a 3D camera in AE of some footage. Then I placed the target and created a solid and a camera. I then exported the 3D data to c4d and added a car to the scene.
Rendered in cinema 4d it looks like this (all screenshots are cropped, so please don't mind the misalignment..):
Object buffer to use as a matte later to separate the car from the white background
The shadow layer (will later be multiplied..)
The Ambient Occlusion layer
The main problem is that when I don't render these in Cinema 4d but use the C4D integration the Object buffer looks (sometimes - not deterministic) like this:
With most of the pixels inside the boundary of the car being black that actually should be 100% white!
Basically the object buffer is screwed up like this every few times I render the frame in AE. And it's impossible like this to render an entire movie clip...
The shadow and ambient occlusion images are also broken ever so often, but I think it all stems from the same issue.
Regarding the settings:
In C4D I use the compositing tag with object buffer set to 1, which is the same I specify in the output settings in C4D for the object buffer multi-pass. The other settings are pretty much standard (and I tried work on those as well, but no change.. )
In AE I use the maxon cineware 'effect' (thats the standard one you get when you drag a c4d file into AE) and selct multipass. Duplicate the layer 3 times. For the highest I select the Ambien Occlusion Pass and use Multiply blending.
The second highest is the Object Buffer, which I use as a matte for the 3rd layer, the actual RGBA background rendering. For this layer I select 'luma matte' and normal blending.
For the 4th layer I select the Shadow pass and use multiply blending.
The basic workflow I use is also described in this tutorial:
After following it, I got the results shown above.
The 'final' video frame should look something like this:
Obviously this is not final, but to illustrate what I'm trying to accomplish!
Hi Mylenium, thanks for your reply. I now added more information. I hope it helps. If you need any more. please let me know. Thanks for your time!
Have you had any success with your problem? I have the exact same thing happening. The object buffer appears like a solid matte sometimes and a transparent outline other times. I didn't notice this before upgrading to the latest AE version.