While trying to fix the shine map I had an idea which turned out quite interessting:
(Bump-)Shine map test (LOD0,
env map, DDS DXT5)
Download Some shots (env mapping on):

NOTE: This effect is hard to catch in shots, I looks better in-game.
This is just a test, but still... The ship really has a structure now.
Although bumpmaps work quite different (a bumpmap looks different), you can achive simliar results.
But there are some problems:
1. Viewed in a certain angle the map will look flat.
2. You can't simulate big/high objects. This requires a differentiation of the light's angle of incidence. The more you