Quad-dome (by @gelada, based on work by @leashless) can possibly be built as 4 walls and 2 half-roofs, then put together walls first, then roof.

hexayurt: hexayurt.com
h13 + quad-dome: vinay.howtolivewiki.com/blog/other/the-new-hexayurts-2044 appropedia.org/Hexayurt

a great write-up, with great pictures, about how "tiles" work: maxwelldemon.com/2012/03/26/the-2x1-rectangle-and-domes/

possibly best hexayurt video ever: files.howtolivewiki.com/laziness_impatience_and_hubris/

music: archive.org/details/UpTheDarkMountainWeGo

location: Tenerife (Spain), at Canarnova site canarnova.blogspot.com
date: 5 March 2011
construction: @lucasgonzalez of imagina-canarias.blogspot.com with help from Canarnova friends (Miguel Angel, Hector, Pablo, LucasGL and Enrique)

a real-size one might use ferrocement aquamor.tripod.com/rainwaterb.htm
or fibercement ferrocement.com/bioFiber/y5-1x2/biofiber_y5.1.es.html (and please tell us when it's done! thanks!)

(@ names are twitter names)