If by groves you mean the armor lines in the hull then they are made randomly with a plugin called "greeble" and then modified by hand to fit a bit better.



If you ask about windows.. then it's maybe better if you don't ask. hehe

The problem is that I like to use vray for renders and reflections with self-illumination don't work too great in vray so I created somekinda crazy multilayer 3d max standard/vray standard and vray light material multi-material. And since I made it back in the start of the year I don't remember it 100% by heart. But I prolly used 3d max'es standard blend material with .jpg submaps to mask the vray light positions on a metal material.



I only hope I gave you somekinda vague idea what I used, so you can go and test it yourself. : )