Hello,

When I dragged the 3 pictures into Hugin, it warned me that "The project 
covers a big brightness range (...)", which is true. I proceeded as usual: 
create control points, optimize and output to layered TIFF. I did not ask 
Hugin to optimize photometric parameters, as I prefer to do the 
optimization myself in Gimp. The third photo is obviously lighter in the 
panorama than the original (and on looking closely, the first photo is 
slightly darker, but this does not bother me so much as the amount of 
correction here is small).

I tried everything I could think of, but the only way I could get a 
panorama close to the originals was by asking Hugin to optimize photometric 
parameters, which is something I don't want him to do.

Can someone tell me what is going on and how I can get a panorama with 
photometric parameters identical to the source photos?

Source photos in digiKam: 
https://drive.google.com/file/d/1_WAWFEbXfoqTfWetQ7-na4P4Q8eGcQZ9/view?usp=drive_link

Resulting panorama in Gimp: 
https://drive.google.com/file/d/1FNXWqgjit2EaTvefEUY6AurYPK4WO5Jb/view?usp=drive_link

Link to the pto file: 
https://drive.google.com/file/d/1ys3IGZSDIGP0TW7cf4JN7M_ElmPTkUAS/view?usp=drive_link

Link to photo 1: 
https://drive.google.com/file/d/1SPSpMX35mwYer2rNTz7P5nAVRh-Hbhlp/view?usp=drive_link

Link to photo 2: 
https://drive.google.com/file/d/1JlnHtAm-FNTzmt2REs7xM14iVsL-1TfO/view?usp=drive_link

Link to photo 3: 
https://drive.google.com/file/d/1ubXmjo9v997cLiwrmfPD5BxLySBaivjs/view?usp=drive_link

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