Or an add-on to the laser software that produces simulated hand cuts for a more rustic look…

Back in the days when pen plotters were in common use, I remember a software product called Squiggle that would take an HPGL (Hewlett-Packard Packard Graphics Language) file—a file containing the commands to produce a drawing—and emit a modified version that turned straight lines into wiggly ones. It gave the drawings more of a hand-drawn look that some people liked better than pristine drawings. (Think stylized architectural renderings, for example.)