It's from my 3D printed frames so SLS printing was used. PA 6 material. My main goal beside the design overall was to create that tiny pattern detail at the grip. Without mention too much techy details it basically started with a CAD (solid) file than a pseudo print output as an STL which was reimported and recalculated as a reference file to rebuild a matching polygonal surface onto the nurbs curvature. Then a painted mask was a guide to sink back the form into the surface. Finally a density driven polygonal structure to get back a printable file size. Roughly two months of learning and experimenting.