'Keel' motif structure in situ

'Keel' motif structure in situ

This form is identical to the other 'keel' structure.

The 'keel' name was suggested to me by the shape. It looked like an upside down boat hull, rather like a viking stave church.

A dramatic animation of this sea-worthy muqarnas can be seen on my YouTube channel HERE.

The animation shows the complexity of this form. As I developed it and discovered a method of expansion, I also realized that I could fold it inward and ultimately enclose the central arch/dome.