Fog tutorial

I’ve written this because it took me a long time to work out and had a lot of people coming up with allsorts of crazy answers that didn’t work for me so this is my solution to the problem.

The problem is that the Env_fog_controller does not affect the skybox and will come out looking like this:

The solution is to make your fog color match the skybox as closely as possible, but a problem arises that if the skybox texture does not appear to have fog on it, things look strange.
You could make your own skybox that has the appearance of fog which would solve this problem but as a quick fix these settings will work fine.

First thing you have to use "sky_day02_10" for your sky map. (If you look at it, it actually is fogy on the texture which is why it works.) For a list of skies, see Sky_List.

then your "env_fog_controller" should be something like this:
primary fog color: 176 192 202
Secondary fog color: 206 216 222

These are the exact settings used on the bridge level in HL2.
This is an example of how it can look:

Apparently with the use of a 3D skybox this problem can be solved using the sky_camera’s fog settings. Someone will need to clarify that because I couldn’t get it to work.