Hey everyone, Situation I'm missing a sandbox mode to test out rovers/aircrafts in other environments than Kerbin. Suggestion Add another building named holodeck/holosuite/simulator and the corresponding option in the assembly building. Before running the test the user can either choose a planet from the list or (for funnier experiments) specify a custom size/mass/atmosphere/texture/displacement map. The game then creates or loads a planet with the chosen settings and places the vehicle. No other planets are required in this mode. In career mode I suggest starting with only Kerbin/Mün as possible testing areas. New planets and moons would be added as the player visits/approaches/analyzes them as part of the game. Since it's for testing only there could also be a "holo-like" texturing. Thanks, Yhoko