(After my above reply, I see several folks are explicating their method a bit more; I’d like to do that, too, so I’ll just pick up where I left off in my reply to @hightowersdeepwells. )
As I said above, @Plym’s zither was the through-thread for the piece. I, too, was attracted by @hightowersdeepwells’ melodic loop, as I heard many other people make lovely use of; I reversed it and pitched it to fit with the key defined by the zither, then added a relatively high frequency ping-pong delay, but the rest was happy accident.
I granular-sampled @NonSangfroid’s vocal sample, then granular-sampled that and played the result for the first melodic bit you hear after the zither enters at the beginning.
I took a chunk of @GoneCaving’s melodic sample and used that following @hightowersdeepwells’ guitar loop. Lastly, I stretched, pitched, then chopped up @widdly’s thumbpiano sample and played that over the final sequence.
The whole thing was processed, variously per track and at the master track, through Valhalla Vintage Verb.