I'm having a difficult time figuring out Projection Mapping in Octane v3 for Cinema 4D. I'm very familiar with the process using C4D's built-in renderers. I've done it many, many times. But Octane is throwing a wrench into my plans.
I have a Projection node with Perspective mode. And I have a Camera chosen that's used as the texture projector. And that's linked into an ImageTexture node which is piped into the Emission channel of an Octane Diffuse shader. (Emission is power 1, with Surface Brightness turned on).
The main problem is that the image projected onto the geometry is upside down and slightly stretched tall.
Secondly, if I pipe the ImageTexture into the Diffuse channel, the C4D viewport of the projected texture does not match what's in Octane's Live Viewer. So it's really hard lining up geometry to the image in the C4D viewport.
I'd post a scene, but the project is on an isolated machine without network access. And the machine I'm writing this on doesn't have an Nvidia card to run Octane. But I would appreciate any help (or sample file) figuring this out.