I use a camera above a part of my machine bed to import a calibrated picture of irregular stock into vcarve. It works pretty accurate.
I have some posts about the overal setup here:
If you like me to go in depth on how to get a calibrated picture from lightburn to vcarve, I’ll be haappy to. Vcarve unfortu ately doesn’t support camera input (yet).
I use it mainly to allign carves with laser etches and to design carves onto irregular projects. It works well, once you work out all the weird headaches and brainbreaks.