I made a video documenting the workflow I figured out for modeling Celtic knots in 3D with Nomad Sculpt, creating depth maps with them in Blender and, using those for 3D carvings on a laser and desktop CNC machine and, for making single image stereograms.
Shout out to @Holger_Schoenischka at 4:55 for his help.
More photos and the stereograms on my blog post here: Celtic Knots in 3D