Well my friend Paul created Hi-Res desert skybox replacements because he really doesn’t like 256 sized textures so he upgraded it to 512 
Looks much better so have fun throwing these into your maps Well if you want other people to experience the enhanced version you gotta zip them up with your map 
:blah:
http://www.forumplanet.com/planetdoom/topic.asp?fid=8330&tid=1446406
Looks cool!
Indecently for those interested you can create your own cubemap textures from your position in game using:
envshot <file name> <size (eg 512)>
These get dumped into the env folder, prefixed with the specified name.
-Fluffy_gIMp
So you could model some awesomeness pai looking terrain in your fav model editor and load it in doom and do an envshot and you have your new skybox?
Zombie