Outputting files with multiple layers

I've been trying to find a way to output psd or tiffs with multiple layers. E.g. combining the outputs of different savers or some completely different way.

Can this be done within Fusion, or would this have to happen outside of Fusion? Any ideas? Maybe s.o. is already doing this?

Sometimes I have to share my output with fellow designers who usually use other software.

Thanks again
David

You can do that with EXR or RPF, but that's it, and even then it's limited to a few layers. Anything else you'd have to do externally.

the only format the lets you save multiple channels in fusion is OpenExr, but here you still limited to a fixed number of layers