you totally lost me?
open the dfxmed> edit> "General information" click-on that item bring up the manul below:

its right there unless you using Nile? were i am clueless in that,
never like it from the start
enviroment file deal with the sky weather look cloudy to stormy weather look to clear skys or even night time full moon.
there are many to pick from.
here a tool to pick the one you like its ad-ware every time you use it dang thing like to connect to the maker web site.
Terrain Reference Tool
details: This tool will allow you to view terrains and environments without loading them into the game first. It saves alot of time when trying to pick the perfect environment or terrain for that perfect map!
tool link:
http://www.novahq.net/?show=utilitie...et_file&id=332
i like using it but man it can bug me (meddle of making a map up) when it like to go to the site i use internet options to block it from the web site (URL) i added in the url address to block it from loading up, and set the firewall as will to block it. thats the only thing that bug me about it....