How do I dress a 5-window turret without blocking the natural light?

Lesa, have you considered Roman Shades? They can be put up with Velcro stuck to the headers of your blinds. You can get (or make) heavy ones that block out the light or light ones that the outside light shows through.

There are cellular shades with soft fabrics, mimicing sheers.

I use lace curtains. (white)

Thank you, Vera. Can you share a photo please?

I had a similar challenge years ago in a home I owned and solved it quite easily and inexpensively.

I screwed large white cup hooks, with opening at the top, above each outer corner of all the windows. After all the hooks were installed I measured the whole distance from the first hook to the last hook. Once I'd done that I added a few inches because I bought some clear flexible plumbing tubing that would fit in the opening of the cup hooks. I added the extra amount because I wanted to be certain any undetermined length that the curvature might cause would be accounted for.

My intention was to use fairly open lace panels, hence the clear tubing. I also bought a pair of decorative curtain end brackets to give the illusion of a traditional rod once I'd threaded the lace onto the tubing. Problem solved.

I too wanted something to finish the look and this is what I did- https://www.hometalk.com/diy/living-room/curtains/my-bay-window-solution-35953556?r=2

My Bay Window Solution!