Virtual reality pictures is the future for the 3D representation of knots.
( It would be great if we can use different colours for different ropes, and be able to zoom in and out. The feeling one has when he can translate and rotate an object, and change the scale of its picture, is superb, and , for knots, it provides an understanding that still pictures can not offer ).
You do not need us ! You are ahead of us. We need you !
Now I am thinkng of it, I see no reason to post any more pictures of knots...I will send them to you, and you will re-draw them, and offer them in 3D virtual reality form. I am saved !
I will e-mail you all the knots I have taken pictures of, immediately. You are absolutely free to use them as you wish, as they belong to the public.
You could help the user by having a "tree" structure, that connects similar knots, into families of knots. The best web site for knots is :
http://www.layhands.com/knots/ Congratulations !
P.S. knot4u is absolutely right. You should present models of loose AND tightened knots.