Not sure how much this applies to other engines, but when working in unreal i will adjust the brightness of my textures with a multiply node. Iv always thought that the biggest contributer to making textures sit together is just the brightness of them, as well as the saturation, Also looking at your level in unlit mode…
Sounds like a good thing to be able to tweak the materials in udk with a multiply node instead of having to change and reimport textures from Photoshop. At least until you've figured out what needs to be done. I suppose I could add desaturate nodes as well to see the scene in greyscale. I'm still learning UDK so these kind…