Since I am now focusing on making black-and-white ink drawings, I thought I'd brush the dust off some tools I had programmed long ago, programs that generate black-and-white textures.
The trick is to not make these patterns look too sterile. I used bitmap inputs to add design, and something that is known as Perlin noise to add randomization.
See below some samples. They each give a different feel. I think I might give it a go and try to use these in upcoming illustrations.
And of course the obligatory cross-hatch.