im probably late jumping on the band wagon for this whole knot frenzy…but im just learning yafray. this is my first attempt at making a knot and using caustics, enjoy 
that is tight my freind!
Ok, so, why I’m the only one to have posted a knot with ends ?
Anyway, very nice, simple, elegant, nice try at caustics 
Stefano
That’s really nice!
Good work! Looks great.
BgDM
is it textured? it looks like the glass contains something like a helix…
I think I see some aliasing artifacts in there. You might pump up the antialiasing.
What can you tie up with that???