k3d/share/shaders/k3d_crayon.sl:17:	stretch - the length of the stroke relative to its width;
k3d/share/shaders/k3d_crayon.sl:63:			float stretch = 10;
k3d/share/shaders/k3d_crayon.sl:83:	float lmks = (aanoise(txtscale * s / width, txtscale * t / (width * stretch), 
k3d/share/shaders/k3d_eyeball.sl:90:   * of turbulence functions.  Some stretching is done to get it to look
k3d/share/shaders/k3d_eyeball.sl:109:   * just a stretched turbulence function.
k3d/share/shaders/k3d_redapple.sl:20: * my apple's parameters are stretched a bit?), so if you use
