Frequently, when people submit ages to be uploaded to Deep Island and used Korman for building the age, my automatic scripts often complain that the age does not set up any fog in its fni file. Unfortunately, at least in Uru:CC, this means that the age will just use whatever the fog is in the age the player is coming from -- so the age will look different depending on whether you come from the Nexus or Relto.
Typically what I do in that case is add "Graphics.Renderer.Fog.SetDefLinear 0 0 0" to the fni file, which turns off the fog. But maybe the Korman defaults could be improved so that we do not have to do this manually for each age? (Not having used Korman myself, I have no idea what the defaults are.)