Not a bad idea, though filling an area with a vector pattern is not trivial with Inkscape (though it can be done – see Halftones in inkscape ), and getting said pattern to be a continuous path is not something I’ve figured out how to do yet [nor seriously tried]. I hope that someone reading this is more clever than I (safe bet!) and has a sneaky idea because of what I posted.
I did wonder what it would be like to fill a vector with a tight vornoi pattern. I’ll queue that up.