Asteroids question

[Deathstalker]

With the map editor you can give asteroids different types (rock/ice/gas) and atmospheres but it won't let you build them because there is no .bmp picture for the diff types. (just like there is no small/tiny gas world pictures). If you were to add the pictures though, would you now be able to have these ice/methane asteroids etc????
Thoughts.....

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"The Empress took your name away," said Chance.
Owen smiled coldly. "It wasn't hers to take. I'm a Deathstalker until I die. And we never forget a slight or an enemy." -Owen Deathstalker.