Dome shade solution

[Crawdad]

I think I may have found something.

These guys make a flexible curtain track:
https://www.theflextrack.com/

It has rollers that can operate pointing directly out from the track, so you could mount it on the inside of a yurt

dome

compression ring. It would pull a circular curtain open, ending in a closed wedge as seen in the pic of the round window.

I guess it would be operated with a rod or you could run a cable on rollers down a rafter bean.

I would have to sew the curtain myself.