Ah! the reason is that both have the
EnvColors_Atl.dat file, mine is basically the same just green!! enable mine over the top
or make a copy of the original
GWX 16k mod, copy mine over that then rename the mod to
GWX 16k mod Green Atlantic, then enable that one!
Note: not sure what it's called (
GWX 16k mod) so just give proper name!