Imagine it twinklng away.

I think the Adam illumnation also had gauze panels which would have been illuminated too , rather like the stage effects De Loutherbourg produced at Drury Lane Theatre, when he used
"tranparencies" to create special effects on stage.

"Transparencies" were usually made of screens placed well upstage covered in linen or calico and painted in a transparent dye.

One of his most famous effects using "transparencies" depicted the “Cavern of Despair” and it was used in the penultimate scene of a pantomime.

It was painted on the front side of the transparency/canvas and was visible when a light was shone on it from the front .

On the reverse side was painted the “Temple of Virtue” which, when lit from the rear, would suddenly burst into view.

Oh, how I wish for the gift of time travel( with guaranteed return to the present) and an invisibilty cloak.....