In Blender I would often camera project my footage back on top of geometry for certain VFX shots. As a quick test in C4D, I motion tracked a 3D face scan over some footage with the goal of using camera projection to put the animated footage of the face back over top.
I ran into a few issues:
Although the alignment seems OK in the viewport, Octane render has the head completely misaligned
Later in the clip, as the head position changes, the misalignment in Octane seems to resolve itself.
This is Octane's render of the Background material (which is also the footage) - note that for some reason it is stretch in the vertical axis, which could explain some of the alignment discrepancy, but I can't figure out what's causing it.
This is my render settings vs the material, I wanted to note that the aspect ratios are the same.
I'd also like to know how I can avoid this shadow in the render. Essentially, the hollow area of the 3D model is being shown, when what I want is to have this part be invisible and blend seamlessly into the footage
As an aside - does anyone know how I can "lock off" the projection camera so that if I create another camera and move it, it won't alter the trajectory of the projection? At the moment, any time I set up a different camera in the viewport, the Octane render instantly jumps to that view, and re-projects the footage over the model from that angle.
I realize there's many factors as to why the camera projected material is not aligning, but if anyone has any experience/expertise in camera projection in Octane, I would appreciate any guidance. I also have my C4D project file available for download if it's easier to check out the file:
https://drive.google.com/file/d/1GsqPRn ... sp=sharing