OsSetRegionSunSettings
From OpenSimulator
Function Syntax: osSetRegionSunSettings(bool useEstateSun, bool sunFixed, double sunHour);
Returns: NULL
Example
default { state_entry( ) { osSetRegionSunSettings( FALSE, TRUE, 12.0 ); //Sets the region/ terrain-tab to non-estate, fixed-sun and at dusk settings. } }