Hi
I am making a game that takes place outside at night. I want to know what values for sun and ambient (in WED) would look good.

I also though to make it fogy. Wath for color do you recommend me. Or what skybox would look good if I don't use fog. Or is there a way to use fog and skybox. Maybe a skybox where the moon is blurred to make it look like its behind the fog.

I'm just asking this to know what other people think. So I can make a better game.

Maybe I'll upload some screenshots later.

well, its really hard to tell you a specific value for the sun and ambient value. I'd recomment you play around til YOU think it looks good, but make sure you write a function where you can change those values in realtime while you run around the level, you can also find a similar code in the Aums or even in the Manual i think.

Night Skyboxes you can find all around the Internet or even the forum or Free Recoures Site.

Fog makes the Night Scene even more atmospheric, you can check out Helghast Fog Code for that (Search for it).
Also make use of distance fog (manual).

OR...

just take a look at MystyMood, which has dynamic day/night change.

It all depends on the genre, style of graphics and the effect you desire to achieve.

You can get a good RGB value for the ambient and sun by first making them to almost 0, and then slightly pulling them up with heightened blue value. A script creating a panel that shows the current values, bind keys to the sun/ambient and begin slowly to play with the values.

As for the skybox+fog: it's possible and it should work just fine. There should be a fog setting in the WED properties and I think you can change the values with a script.

If it has to pitch dark night, sun and ambient must be set to 0, but it depends on the gameplay, whether you want to allow player to see in the dark or not

A nice star cubemap, make up most of the athmosphere.
For the ambience, try to make something like
10,10,20 For RGB Color (Blue is always a nice night-time color)