From up and down, and still somehow
It's cloud illusions I recall
I really don't know clouds at all
(Joni Mitchell)
Crepuscular: is one of my favourite words (although not one that often crops up in conversation). Crepuscular means pertaining to twilight and is also used to describe the rays of sunlight that appear to radiate from a single point in the sky and which stream through the clouds (this most frequently occurs during twilight when the contrast between light and dark is most obvious).
"Here we are all, by day; by night we're hurled
By dreams, each one, into a several world."
Robert Herrick (1591-1674)