Marta - many thanks indeed for featuring my panotest shot here - that is a very pleasant surprise, and very much appreciated. What an interesting feature as well. The idea of particular shapes appearing in all forms of visual art has a long tradition, e.g. painters used to put perfect circles in their works in order to show how proficient they were at drawing. Ellipses featured in the still life genre (eg the top edge of drinking glasses - like your bottle top example) as that showed not only the artist's drawing skills but also his or her skill in mahtematical perspective. Anyway, this is a great feature!