I have been using RawTherapee on Linux for several years. Thanks to all who contribute.
I was on vacation in Europe this summer, my last stop was Kinderjidk Netherlands where they have all the wind mills. I took a bunch of pictures, lovely place, then got home and processed them. I noticed something very odd, to me at least. Some, probably most, wind mills came out brown, but in some pictures the same wind mill came out gray. See the attached photos. I promise I am not playing a trick. In the two photos I show I used the same “Daylight” white balance to see if that mattered. I do know at some point in my picture taking I used a circular polarizer, not sure which pictures have it and which don’t. I have other photos not included here that do the same thing, usually the same wind mill comes out brown but sometimes its gray. I am curious as to why. Any ideas?