You'd want the inner pane to be actual glass, too, so you can clean it with water or handle humidity. But at that point, the gap in a double-paned glass will i

You'd want the inner pane to be actual glass, too, so you can clean it with water or handle humidity. But at that point, the gap in a double-paned glass will insulate better. I wonder if you could sandwich this in to one piece, like automotive glass -- glass/wood/glass?