I use PM to cull images from a wedding, generate the proofs, make selection and then take the required images into LR for the full editing. I shot Nikon so it is folders of NEF files I'm working with.
For the proofs there is the odd image that need work for the proof stage, so I take the NEF file into Nikon Capture NX2, make some quick edits and save it, the preview is updated in PM to reflect the edits made in NX2.
Can I do the same with Adobe Camera Raw as I do with NX2, I can take a NEF into into ACR that comes with Photoshop, but I can't figure out how to "save" the updates so I see them in PM.
I'm guessing that as ACR can't write directly to the NEF file and has to generate a xmp file and that I need some way for PM to read the xmp file generated?