This will create asteroid groups or fields. This is for PC only. It is in Beta and so I already know about the following -
The node groups created still need to be neater.
The more asteroids, the slower your machine will go.
By choosing to increase the group size, you will increase the amount of time the program runs. A lot. Be patient and you will be happy you waited.
The farther out your asteroid group, the more unpredictable the asteroid group's behavior. Two behaviors I know about at greater distances - lighting decreases and the asteroids within the group spread out more.
Have fun. This program is a step toward creating something; not the actual final creation. Use it as a step gap.