Hello,
The colors in the standalone game are totally washed out. I Tried gamma, sRGB, specular, in textures and adding a PostProcessing Volume, to no avail. In fact, the fading is dynamic, it gets worse if the player is not moving, changes quite a lot depending on the direction the tank goes…maybe it’s a performance problem? Next I’ll import the whole landscape in a new test project, with default lighting, etc… and see what happens…when I think that the starter content table and chairs arrangement works perfectly! Hopefully it’s just a tick somewhere. Can you help?
That sounds like you have problem with auto exposure aka eye adaptation, it’s a post processing features and you can disable it by setting minimum and maximum in post processing (camera or volume) auto exposure to same number (set it to 1.0 and then you can control exposure with Bias). You can also change auto exposure method from default histogram to basic, may give you better result if you want to keep this effect.
You can debug auto exposure behavior by typing in ShowFlag.VisualizeHDR 1 in command console (press ~ or type in to Output Log in editor)
Here docs about this effect:
Wow, it really was a one click thing!! Actually, 2 clicks, but one check box: in the camera, I changed Auto Exposure to basic, that’s all! Thank you so much! 
