Thank you Eugeny and Noah for your replies.
The “Log Processing” is indeed automatically turned on as ARRI Log C for the raw footage, but that’s not what I’m having the problem with.
On location; in the DIT truck; the guy was ingesting the raw from the Alexas; syncing the supplied audio from sound; un-squashing the anamorphism; running very basic grading for shadows and highlights and only THEN, rendering out 1080 ProRes 4.2.2. “editorial” versions that I could take with me on a drive for FCPX.
I watched him do it. Saved me having to do all those steps myself with full 4K monster, anamorphic files.
It’s THESE 1080 ProRes files that look perfect in QT, but dreadful in FCPX. And of course, as they are ProRes, there is no “Log Processing” option available in the Inspector…
I have the origibal RAW footage. I can re-sync all the audio (there’s a lot). I can do everything I have to do to make a new set of 1080 proxies. But I thought I had already been given them and QT says I have!
It’s only FCPX that doesn’t want to see them for what they are.
I hope that makes sense? The problem at least…
Thanks for your attention and patience in this.