I met Michał Kosmulski at het German Origami Convention and not so long ago he created the
"Double Spearhead Tessellation" and I finally found some time to fold it too! (first row, left photo).
I like the backlight versions of this tessellation very much, because you can see so many patterns each time you focus differently. That why I rotated it too, gives a different feel. (first row, right photo).
In the second row you see my variation of this tessellation, called "Neptune scales" . Big thanks to Marguerite-Helene ;-))
Here you can see the beginning:
"Blocks"
Both tessellation folded from 20x20cm, glassine, grid 1:24.