Pentaxuser - I have in multiple threads on this forum discussed the need for appropriate filtration at the time of the shot in relation to certain color negative film applications. I won't repeat any of that here.
I will only add, that in relation to the drift of this present thread, and pushback on a few of my own comments (which I don't resent - a little rugby won't hurt any of us), that what was once regarded as routine in professional circles when using color film is now, in the instant-everything generation, regarded as hopeless difficult and arcane. In the minds of many, it bizarrely makes more sense to spend days on end trying post-correct some image rather then spend 30 seconds up front attaching a proper color temp balancing filter, or going through the cruel ordeal of actually using a light meter.
It's just so much easier, they assume, to make one's confession spending a few weeks on the Inquisition rack afterwards.
But I always do learn new things here. I did already knew that the highest summit in parts of the Midwest changes regularly, depending on what the cattle left behind that morning. But I never knew these were the same "pigment mounds" which determine the muddy outcome of so many color neg shots. That explains quite a bit, really.