Skydome rendered with Terragen:
Two suns both close to but on either side of the zenith give varied lighting on either side of vertical objects, (Buildings). One is large and cool the other small and hot; the wide spacing of the suns give areas of full shadow and patches of half light. some cold and sharply defined, some softer which are warm with a red shifted tint.
Partly reflective surfaces will show twin bright points with colour variation. Fill lighting from the partly clouded sky is medium strength and slightly blue.
Lowered horizon and flat fractured rock ground viewed from a standing height of 1.7m but not obvious if seen from higher.
Note: The preview image uses the Filmic colour transform.