I want to say what has happened with me, recently. I hope this is not a bad topic in which to talk/ask about it.
At first, Color Calibration seemed simple. But I kept getting weird results. So, I went to the module’s documentation and tried to learn to use it correctly and systematically. I started getting much better results.
But for the last couple of days, I am still using it the way I learned, but I’m getting weird results sometimes, again. I don’t think I’ve strayed from what I was getting better results with. An example was the mountain stream photo, yesterday (I’ll add a link after I finish this post). The CAT swatch seemed to show a very good white swatch, but the photo itself ended up very blue/green.
Then, when I forced it to have warmer coloration, the CAT swatch looked quite green, but the result image looked great. And the module complained that my temperature was “invalid”. I am one confused puppy.
I guess the lesson is that the input can be strange, making the tools act strangely. Maybe.