Speaking of see-through.
Has anyone ever seen two-way glass that allows bidirectional observation within proximity of it's surface but diminishes with distance of either observer or view-field depth?
It was used in a pair of bathrooms (men's and women's) for the washbasin "mirror" at a restaurant or nightclub on or near 6th Street ATX about 2004. It allowed washroom patrons to see each other in the other bathroom, but not past a certain distance within each bathroom and didn't work if the viewer were far away.