You see, when you open the editor and test, the sky will be all grey.
You can also find fog values in the settings of your levels, but they are hard as ♥♥♥♥ to use.
So in this guide, I will be teaching you how to make good looking skyboxes without using the annoying fog values. I found out this method after a bit of testing and i've decided to share it with all of you. You may have seen me use this method in my ''Honey, I Shrunk The Bikers: Hell Kitchen'' Map.

First, you will want to select the Text Prop in the ''Other'' tab of the Prop Selector. It appears as a yellow circle with a picture of a Pencil on it.

Then, Use C to spawn it in and you will immediately see alot of stuff on the top right.
Now, you will want to set the size to 100 then Copy & Paste this Ascii Rectangle into the text space.
█
Then, you will want to paste it as much as you can, and set the colour to whatever you want.

Then, you will want to use Ctrl + D to surround your map with the sky. Sadly, the final result screenshot is too large to paste here, but it should look like this in the editor.