thanks. will check that out.

did a google search. there is no film that gives nighttime privacy and allows you to see out at the same time. daytime privacy is another story, but we are looking for nighttime privacy. so I think I need to devise some kind of window treatment.

I'd try two tension rods with sill-length curtains on rings. The rings will be easy to swish downhill. If you need a catch for the uppermost ring to keep them in place, a simple cuphook would probably work. A curtain wand attached to the uppermost ring would keep the curtains clean.

Who can actually see in there have you tried going outside and seeing what is visible I don’t think much

Yes, at night you can see directly in to our open loft bedroom from my neighbor's yard and from our yard.

Suggest you install a ceiling-mounted drapery rod along the open end of the loft, OR sliding panels (acrylic / wood / fabric).

You could install flip down foamcore shades with a hinge on the bottoms to keep them attached to the wall. The shades could be covered in fabric with spray glue.

This video shows removable foamcore used for insulation. https://www.youtube.com/watch?v=wy_CWNDcK9o

A google search on foamcore blackout shades will turn up other ideas.

Not to seem oblivious, have you checked with a blind company? I was an installer and I would be surprised that there isn't a product you could buy that would work somehow.

thank you everyone for all the suggestions. we're trying to avoid the ceiling mount drapery effect across the open loft, but that is a possibility. and we thought about creating some kind of hinged shutter - foam core is an interesting idea - but the space below the windows is not large enough nor could we fit any kind of shutter hinged to the side. Sigh... this is why these windows are such a pain. And we're trying for a homemade solution to avoid the expense of a blind company.