The Hexayurt is an incredible project, reinventing disaster housing: http://hexayurt.comVinay Gupta, the creator of the hexayurt approached me to try to find larger shapes that could also be build (reasonably) simply with zero-waste from 2x1 rectangles. His version of the story is here: http://vinay.howtolivewiki.com/blog/other/large-hexayurt-style-domes-a-problem-solved-1730I came up with two additional larger domes. Models for the original hexayurt and the two new domes are all here.A longer write up and a little more detail are here: http://www.tilings.org.uk/Hexayurt_Family.pdfLasercut with a thin line for red and thick for green out of card. Fold back each dotted line (fold completely back, but only in the right direction). Insert tabs into green line slots as you construct your model.