Meanwhile I have found the eye-offending textures which are 136b2hw1, 136b2lm1 and 136b2su1. It seems that the FTX Global ones are probably identical to the original Prepar3D/FSX textures, but the night texture is definitely brighter which makes things much worse. I changed them back to the stock ones which is a small improvement, but still not great. Guess I’ll have to look into getting more airport addons…
I assume your stock EDDF will look similar?