Actually, I'm not talking about reflectivity, that's the last thing I would expect from a well traveled bucket of rust (not to mention that the last thing you need on a warship is something to reflect the sun/moon, making it visible much farther than usual).
I'm talking about a light source similar to the sun. That creates lighting effects on the boat (as seen
on this picture, the top is exposed to the sun so it's lit, while the portside is in shadow).
So I'm asking the modder gurus whether is it possible or not to assign lightsources to explosions and fires. A blinding, flickering blaze on a tanker at night would really brighten things up (pun intended :P ).