How to add a sky to a map
by Slowhand

      After making a part of the map you can add the sky. To do so select the texture called "SKY" which is light blue. You can see that on the image below.

      If you don not have this texture you have to add the "halflife.wad" which contains the mentioned sky texture. You can find more about how to do this in the tutorial on how to set up Hammer.

      Then I use the "blocktool" to make a box that covers the top of the map. Below is how i mark my map. (I have -1 in my grid settings)

      Now make the box by pressing "enter" or rightclick the marked area and select "Create Object" and select it using the pointing tool.. Then select the "Map Properties..." in the "Map" menu. Select the "enviroment map (cl_skyname)" and type in the skyname. I have chosen "desert" in this example.

      These skies should be available on a clean Counter-Strike installation:

• 2desert
• desert
• backalley
• badlands
• blue
• city1
• cliff
• cx
• de_storm
• Des
• doom1
• DrkG
• dusk
• forest
• green
• grnplsnt
• hav
• morningdew
• office
• show
• showlake_
• tornsky
• TrainYard
• tsccity_

      More can be downloaded from the Internet. You might want to look in the "...\Counter-Strike\cstrike\gfx\env\." folder to see which skies you have already installed (exclude the last two letters from the filenames in this directory).

      Now you are ready to save and compile.

      The tutorial map looks like this with sky when its compiled:

Note

      Some mappers, especially new ones, tend to make a so called sky box around their map. This should be avoided as it slows down compile times and makes the map lag more.