Bake procedurally generated maps in the C4D reflectance channel for use as PBS shader in Unity

Hello,
I’m curious to see if there are any suggestions to bake the procedurally generated noise maps from the reflectance channel in C4D to a greyscale image for use in Unity - and PBS shaders.
—I don’t expect the output to be a perfect PBS conversion, but a decent starting point.

Alternatively, if there are specific tutorials, or tools, scripts or plugins that specialize in this - that would be good too. (export C4D material to Albedo, Metallic/smoothness, Normal, AO, etc)

Thanks in advance for your help.

Cheers,
Jamie

edit * added “from the reflectance channel ”