Skyness

[…] the sky surrounding us, so alive and immediate I felt I could almost put out my hand and immerse it in 'skyness'.

You can't impact the treeness of a tree, the skyness of the sky, or the rockness of a rock.

There is no latent structure incarnated, no inherent skyness or lakeness in an abstract structural relation. The sky or the lake is not structured, only the film.