Hi, Anyone know a good place to buy (or get free!) sky boxes or sky spheres? (But not domes... need a full sphere of view). Fantasy or space style is a bonus! Or any software to generate them?

http://www.scentednectar.com/skyboxes/
http://kell.leveldesign.org/q3skyboxes.html
http://www.art.eonworks.com/gallery/texture/skybox-200101.html
http://www.celticwarriors.net/Website/TextureDatabase/Unreal/SkyBox/SkyBox.htm
http://skymatter.thegamecreators.com/?f=index
http://forums.xna.com/thread/22938.aspx
Hope these help!

Thanks!

A commonly used tool for generating landscapes is Terragen.
See also Creating skyboxes with Terragen