Thank you I didn't know that wasnt already included in the game. I suppose I shouldn't be complaining since the real editor is coming out soon but I still wanted to make this.

so I was trying devmode (on steam) and made this awesome level with the forest tileset. I saved it and wanted to make a rapture level but when in the F2 menu and I click the V to select tileset the black rectangle just goes on and off, and no options appear. then if I click create there is a fatal eror and a message pops up saying the game has crashed and a mini-dump (hehe) has been sent to team meat. (its something like that) I tried multiple times and the same thing always happens. am I doing something wrong?
will post pics if it helps