A unfinished city with "light" entity clicked on.
The unfinished city with yellow texture and "info_null" clicked on, yellow texture is the sky texture (skygy001). This is how it is looking in Quark editor. In the game will be normal.
"Is" are my modification and after "not" are panjoo's ones. The rest are how panjoo told us.
"_sun_ambient" is -20 and not 100 or 120 150 50, for shadows. You now have proper shadows. Feel free to experiment.
Sun part one
"_sun_angle" and "_sun_mangle" is what i have used. "_sun_mangle" you can add in Quark by clicking "+", when you double click your worldspawn.
"info_null" is what i used and not adding any values to "_sun_diffade" and "_sun_difwait", because you are using "info_null" with targetname inside.
"_sun_vector" is missing, panjoo didn't explained about it.
Sun part 2
When you enter worldspawn, add the following :
Add a "info_null" and write a targetname :
"info_null" will pe put next to the "light".
Add a "light" and write a target :
Use 2400 or little depending on the size of the map.