I found the culprit, it's the weather mod (CGIM) included in the package in additional mods.
I tried with just the main files and everything works correctly, but once I instal the weather mod, the lightning gets weird (way too much bloom and fake shadows even when AO is disabled), every surfaces are bleeding light, and the colours are completely wrong.
I haven't tested with the weather mod from the launcher, but the one from your archive is definitely the culprit.
Edit: I tried with the launcher version, it doesn't work, the game crashed when trying to create wa new game.
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