Added two new planet classes:

Titans - ice worlds with a hydracarbon ocean

Fully cloudy planets - Venus like warm deserts and Titans

A bunch of screenshots. Note darkness - titans are cold worlds, far away from their suns.

Header image: orange moon with dense cloud layer, like our Titan. Black sea of oil on its surface:

Less cloudy moon:

Some wierd canyons can be found on that moon:

Titan with blue atmosphere:

Binary titan planet:

Titan with green atmosphere 🙂