Overshadowed

Matthew 17:3-6 ESV

3 And behold, Moses and Elijah appeared to them, talking with Him. 4 Peter said to Jesus, “Lord, it is good for us to be here; if You wish, I will make three tabernacles here, one for You, and one for Moses, and one for Elijah.” 5 While he was still speaking, a bright cloud overshadowed them, and behold, a voice out of the cloud said, “ This is My beloved Son, with whom I am well-pleased; listen to Him!” 6 When the disciples heard this, they fell face down to the ground and were terrified.

This word translated as overshadow was used when the Holy Spirit came to Mary and Christ was born. It might be said He was transfigured at that time from His heavenly state to earthly form. 

The light of heaven descends to earth and the word of God is spoken. And God saw that it was good. 

ἐπισκιάζω * episkiazō * ep-ee-skee-ad'-zo * From G1909 and a derivative of G4639; to cast a shade upon, that is, (by analogy) to envelop in a haze of brilliancy; figuratively to invest with preternatural influence: - overshadow.