I agree with your reasoning, Poita. We just don’t have the information to use the props to fix the colors. We’d have to know all those variables for each shot and as far as I know, it doesn’t exist. I think the production photos and props can help tell if the colors are off, close, or good, but only if you have a good eye for colors and how they change due to lighting and the other variables. For instance, if you look at the GOUT, BR, and SSE, and compare them to a production photo, you should get a good sense of which ones are close. I’ve actually noticed that even though a lot of production photos have a strong yellow tint, that the intense reds and blues still come through. You can’t match to them, but they really point out how off the reds are in the BR.
I think we have to really examine the history of each source. We know the BR was scanned from the SE negative. We just don’t know how they arrived at such a unique color palette. The GOUT was a telecine. I heard it was a good quality interpositive. In that case we know it was a first gen copy of the negative, properly color times, but printed with an oragy hue. I don’t think it was fully corrected in the master tape. I’m not sure what all the histories of the 35 mm prints, but I heard one is a copy of a release print. That would mean it is darker than the original. And the original release prints are a copy of the internegative from the interpositive, from the original negative. To really know the prints, you have to know how the image changed at each stage. Seems like there are some mysteries with each copy, but if we use all of them, o think we can arrive at something close, viewable, and easy on the eyes.