Removing birefringence effect

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SwampCanary New Member • Posts: 4
Removing birefringence effect

I recently took some photos out of an airplane window with a polarizing filter on, and they came out with an interesting but annoying rainbow effect that I have since learned was caused by birefringence in the airplane window. I was shooting in RAW so I'm hoping I can salvage these shots. Is there a way to remove this rainbow effect in processing, specifically using Rawtherapee and/or GiMP?

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