Thus the story of the birth of the children where the gods arrive at the house of Reusre to help Ruddjedet likely means "below the horizon, following the sun set".
The anthropomorphic gods however, were born in the East, at dawn. ie. Sunrise occurs with the DuatSky as backdrop. Their 'birth' is associated with ascent of stars above the horizon -- in the twilight prior to being faded out by the brightening of the sky -- ahead of first light.