There *is* a population of planets possible...
But anyway, through the method you're using, a programmatic approach of directly writing to the .tgc or .tgd would be best. Look into your .tgd and you will see it's a human readable XML file. Find the area that defines a planet, or one of your asteroids, figure out which parts you want to randomize or adjust per asteroid (position, size, etc.), then write a simple program to write a new planet definition entry sequentially to a .tgd file for the specified number of iterations and with the specified randomization/adjustment parameters. For example you should be able to easily setup a script to output a series of 100 asteroids of size randomized between 10 and 15 km, and to randomize the Power Fractal function applied to each as well. Something to play with...
- Oshyan