Okay. I posted a picture of terrain assets at imgur.com/a/6iNGh
The assets are named by planet type like desert, terrain, and ice then subtype like alien and terrain. So, I can have a alien blend file with assets per subtype planet type. The file naming convention is the same or smiliar.
What i dont have is more variety in desert planet type for both terrain or alien, and variety of terrain plants and rock assets.
So, I one or two cactus and grass for terrain earth like and cactus like alien, then a few plants. That I can find some quick pictures.
I found some imgur.com/a/2gjLM
A few of the cactus plant can be alien or changed to be more alien like.