Hypertexture

I tried to make as many different materials as possible. On the left is one of a series of experiments in simulating woven fabric. To make this, I first defined a flat slab, in which density is one when y=0, and then drops off to zero when y wanders off its zero plane. More formally: f(x,y,z) = {if |y| > 1 then 0 else 1 - |y|}.

I made the plane ripple up and down by replacing y with y + sin(x)*sin(z) before evaluating the slab function. Then I cut the slab into fibers by multiplying the slab function by cos(x). This gave me the warp threads of a woven material. Finally, I rotated the whole thing by 90^o to get the weft threads. When you add the warp and the weft together, you get something like the material on the left.

To make the fiber more coarse (ie: wooley) or conversely more fine, I modulated the bias and gain of the resulting function. To make the surface undulate, I added low frequency noise to y before evaluating anything. To give a nice irregular quality to the cloth, I added high frequency noise into the function.