Aha, missed that line. There it is. Yeah that makes sense about the size. I'm sure you could use DXT1a without mipmaps, if you wanted to be really stingy.
I'm liking this feature a lot and plan to help commit it for you soon. I think a slightly better place for the entry in the ship table would be right under $Shield_icon , what do you guys think? The 3D radar would be nice, but it probably needs the scaling support because of how the dots get bigger when they're 'closer' to your 'eyes'. Not sure how good that'll look when we're dealing with this size.
Very nice art Galemp. I particularly like how you got the cargo to line up with the freighters.

And wow you're right this makes a HUGE difference in battlefield awareness... especially with a bigger radar area

(WIP) I almost think the special 'big' ships icons should be even bigger (Colossus, Lucifer, Sathanis, Hades, etc)