Reminds me of the old and mostly forgotten technique of selective puff underbasing for stiches etc. When proper art/seps/prepress are all in alignment, results can be astounding. Keep in mind that the "stitches" will blow out in 360 degrees so they need to be smaller in seps. This will depend on the degree of puff in the ink (usually a base puff, no pig), mesh counts and other print parameters.
Heres how we did it......Normal plas UB under all required colors, including the puff UB. Its best that the puff UB is based to prevent unwanted puckering. Now F/C, selective puff UB, F/C (IMPORTANT NOTE: Only surface flash the P/U, do not make it puff!), overprint colors (generally 200 mesh). The magic happens in the dryer. Where the puff U/B colors blow, the ink will take on a lighter color of the overprinted color(s) and of course be slightly raised. If you are thinking of a "patch print", consider a slight halftone unbased drop shadow (we used process black 55 line on 305 mesh) to give it a more visual 3D pop without making the print annoying to the touch. Done correctly, great results may be achieved.