So I had an idea. What if on mars, maybe some of the generated structures could be actual structures on the real mars, such as Olympus Mons. And there COULD possibly be lava on mars beneath the surface, and since olympus mons is a volcano, there has been geological activity in the past. So yea, lava might be a good idea. Another structure that could be added is Valles Marineris. I think that if some of the structures that are generated on mars, could be some actual structures in the real world, it would be amazing! Same with the moon. Maybe you could find Neil Armstrongs foot prints, and the american flag? And as for other planets, might I suggest making creatures that are kind of based on their environment? I know it may be a lot of work, but I think it would add an entire new level of immersion to the mod, and would make it 100 times better.