bool repaint( sgVec3 sky_color, sgVec3 fog_color, double sun_angle,
double vis );
+ // regenerate the sky texture based on the current position and time
+ //
+ bool repaint( float lat, float lon, int zone, int julianDay,
+ int time, float turb, bool atmEffects = false );
+
// reposition the sky at the specified origin and orientation
// lon specifies a rotation about the Z axis
// lat specifies a rotation about the new Y axis