This is a serious work in progress, I got the idea from my static rendering project and it works the same way. Click the space bar to start, 0 key to control spawn rates. It is slow so turn on turbo mode. v0.1 only had clouds and dirt v0.2 added grass v0.3 added underground stones v0.4 added the option to control the spawn rate of clouds and underground rocks, just click the zero key (0). Also added the rule where you click space bar to do another scan. v0.5 added trees! v0.6 added a controller for the tree spawn rate. v0.7 (coming soon) adding smooth clouds.
I am trying to randomly generate things like smooth clouds at the moment but it is really complicated and hard.