Hardest crease pattern

[Sunburst]

The hardest CP I ever folded was Ryo Kamiya's housemaid. Figuring out the position of all the flaps and which becomes what is pretty harsh, but collapsing the center flaps (ribbon) is very hard. There's so much tension in this area that it's very easy to get some rips.

[Sroge4]

Not sure if this counts, as it was made with a computer program, but it IS an origami crease pattern.

Stanford Bunny:

[Bubo]

Let me guess - origami boulder!

[Axel´s Origami]

I thinck it counts since tree maker does.

[Alexorigami]

Not sure if this counts, as it was made with a computer program, but it IS an origami crease pattern.

Stanford Bunny:

Bubo, it is NOT a boulder. It is a Stanford bunny. This one, to be more exact(folded by Tomohiro Tachi):

Origami Stanford Bunny by tactom, on Flickr

[Bubo]

Wow. I thought is was just something random from tree-maker - but now that I think about it the unusual perimeter does suggest its not just random. Thanks posting the picture and correcting my misconception! It's certainly a crease pattern, and complex, but I'll leave it to others to debate if it is an origami crease pattern.

[tryingtofoldsumthing]

ah...ha...WHAT? ...HOW? my mind is blown!