Altitude, Space1, Space2 by JWindecker: “This is under the Creative-Commons-BY licence, feel free to edit/modify to your needs as long as I get credit for the original, and this readme is packed with it.” All other skyboxes by soul sub zero: “These are only copy righted to the point that you may use them and copy them, but you have to refer to me as the maker if you are asked/or re-uploading.”