In the following sample images created a 3d model in Tc (not shown),than copy and paste it into Paint.net used the Pencil/Sketch tool saved as a jpeg. Brought back in Tc traced it Spline Control Points Tool and used the Chain Offset feature to engrave.010 deep.Than render it.
Even a mistake may turn out to be the one thing necessary to a worthwhile achievement Henry Ford
If I have ever made any valuable discoveries it has been owing more to patient attention than to any other talent Isaac Newton
I have not failed Ive just found 10,000 ways that won't work Thomas Edison