Thank you very much for that explanation. I’m not in any way doubting the sophistication of the colour processing within NLP and yes of course the results that you get from an individual frame, particularly one that might not have very much colour information to work with, will need experience and possibly time to get right. However I’m relieved by your explanation to this and the other thread that if the original film exposures are correct then you should get exactly the same colours across a group of images of the same subject under the same light as you can in the darkroom when you keep the same filtration when printing each of the images.
Due to my inexperience I’m not entirely sure whether ‘Batch’ or ‘Roll analysis’ should be used in my hypothetical example from the other thread of the building with a bright red or bright yellow truck in front, or no truck at all, so that the building stays the same in each conversion.