'Crescent' motif dome expansion

'Crescent' motif dome expansion

The highlighted 'crescent' of muqarnas tiles in the top, simple dome are the 'motif'. The next layer of the dome is created by:
1. 'Flipping' or mirroring the top 'crescent';
2. Adding it to itself by rotation at its top and 'sliding' it down one tile edge length;
3. Moving the 'crescent' vertically and horizontally so that its top vertex is coincident with the next to bottom vertex of the 'crescent' in the top, simple dome.
Additional layers are created in a similar manner, adding one more 'crescent' to each and positioning at the top of the 'scallop'.

ps Guess I could have called the motif 'scimitar' or 'billowing sail', it is just meant to be visually descriptive.