SkyDome

This shows an adaptation of the article "A Practical Analytic Model for Daylight" by Preetham et al.
(and a HDR carebear donut)

Use Alt+Mouse to manipulate the camera using MAYA mode.
Use Alt+Shift+Mouse to manipulate the camera using UnrealEd mode (i.e. first person).
If you are under Linux and can't use the Alt key, push that button so everything works without Alt.

Time of Day [0,24] - Turbidity [2,oo[