You can repaint units by editing the op2_art.prt or bmp.
For this, you have to wait for an editor.
If you're technically interested, you can also have a look at the wiki page:
http://www.wiki.outpostuniverse.net/FileF...raphics_OP2_ARTAs some of you know, I recently finished a very simple image replacing feature for the op2art viewer.
I hope to get it posted soon once I'm sure there are no major bugs in it.
Hopefully it'll help.
You can also patch the exe at runtime, which minimizes space elsewise need by a completely new prt / bmp.
However this is only recommended for advanced coders.
Oh - Ideas?...
I like to see desert with really yellow sand.
Also mars surface with really red sand.
(the tone of new terra is something in between, you know)