Thanks for your answer!
>Light in the scene should not shift between your shots, why? you have to shoot them one right after the other, not wait for an hour
I agree: light should not shift, but you know, up here in the North (Oslo), light is so unbehaved, it DOES shift, and it does not take it an hour to do so, it can do it i a split second! A typical shooting situation for me is that I stand behind the tripod, one hand on the cable release, waiting for the sun to peep through the clouds!
If, on the other hand, I am lucky enough to catch the same light for 2 consecutive exposures, then what is wrong with auto white balance? I thought the problem was that the automatism would apply 2 different white balances to shots due to light shift? But I have no technical understanding of how the automatism works, and I am open to learn.
(So far, I am satisfied with the result: I remember a day when I was shooting in the same place from about noon into the afternoon. Viewed one at a time, the images looked all natural. However, viewed side by side, those taken near noon were clearly more blue than those taken later in the afternoon. So the automatism does - fortunately - not wipe out the natural color shift in daylight entirely.)
>PS: BTW we already found someone who can build a DNG RAW file from RAW data. A version of Zero Noise with a 16-bit DNG output free of noise is nearing. I.e. the user puts several RAW files and the program will mix them into a noise free RAW file that everyone will develop and/or tone map using his favourite software.
That is GREAT news, and CONGRATULATIONS!