Thank you for the suggestion, but some textures are still not working. It did make things a bit darker (had to raise the gamma setting a bit).
It seems strange that some things look ok (tobacco, brown tigers, scorpions) while others are all pink (salad, avocado trees, coconut palm trees, cougars, snakes). And with sunflowers the flower part looks fine, but the leaves were pink.
Still the same warnings about the shaders, if that's relevant.