C4D - After Effects Compositing Issue

[Spaghettipopsicle]

Ill start off by saying im a beginner, and may not be explaining the issue well -

Im compositing 3D text in Cinema 4D on a 2D image using a plane as my floor / shadow surface.

Everything looks fine in the c4d render view & rendered out, but when I switch to Cineware in AE, anything that is not under the plane with the compositing tag shows up black in the AE render.

[Mylenium]

You have a background object in your scene, which messes with the Alpha. Why even use it at all since you edit the content in AE, anyway?

Mylenium

[Spaghettipopsicle]

It was just the most common way I came across to get the image into the background. Any links / tips for a better way?

I really only use AE to render video, stills I do straight from C4D.

Thanks for the answer btw