Distortion of scale and altered reality. The idea that the night sky could be a veil through which a much larger and superior being can keep an eye on us, is a distortion of size and scale, that is on the one hand comforting, and on the other, disturbing.
Self portrait ideas Mapping 2013 on Behance Use a process like this for "identity/self-concept" activity about skin color/shade/tone/palette. Put vertical photo strip of every child together on a couple images to make a collective face.
Relationship between life and death. inside, outside: No information about this but it is two different photographs put together to create a half skull, half face image. That heavily relates to the theme of inside, outside and in between.