Some general things about Orthodox icons.
1)
they never include third dimension, and shaddow, because it means darkness or death. And, in all way you stand in front of them, you'll always have impression they are watching over you.
2) faces of angels are painted nor like man or woman, becuase they are special kind of nature.
3) background is not important, like I said, no 3D versions, all is linear. It is meaning of no 4th dimension -- time. It becomes dispensable.
Interesting, isn't it? -- look careful over Imperial Icnons, you'll find all those things I mentioned like 1) 2) 3).
Nena.