Hello people,
I was looking for a automatic daylight system. but i could not find it.
So i made a start with a new script.
it is based on a paper “a practical anlytic model for daylight”
currently you can set:
- Longitude/latitude
- day of the yeah
- Time
Then the position and rotation of the sun is calculated and a direct light is transformed.
What to do:
create a athmosphere that changes.
In text, create a dome. calculate colors. apply colors.
calculating the stuff is doable. the rest i have no idea 
So people who want to help are very welcome!
Wiki link : http://www.unifycommunity.com/wiki/index.php?title=SunLight
Comments and suggestion are ofcource very welcome!
This looks interesting.
I was just thinking the other day how this could be very usefull.
Not that I’m of any help here, just wanted to let you know there’s interest in this 
I’ll have to try this. It would be cool to be able to use a “GRIB” ( GRIB - Wikipedia ) file to determine real time clouds and other environmental effects. Probably a -huge- undertaking to implement though. Have you seen this: http://www.unifycommunity.com/wiki/index.php?title=SkyboxBlended
He people.
I updated the script with an function that calcs sunlight color. but i’m not sure if its correct! so take a look at it and improve!!
Hey,
If you haven’t already may I recommend creating a page on the UnifyCommunity wiki that bigkahuna linked?
Need more scripts up there and it’s easier to look for scripts and tips there