
This is a reference guide for designing vinyl decals to fit over a curved surface, using Solidworks or other CAD software. It demonstrates the optimal steps for fine-tuning the shape and offsets of the decal, ending with the surface flattening feature + SVG export available in Onshape. I use this procedure to design stickers for pillowed twisty puzzles.
First, use the Offset Surface tool in Solidworks (or equivalent in your CAD software) to copy each curved surface that gets a sticker. Set the offset to 0 so that the new surface is exactly the same as the original.

Free vector editing tools are pretty lacking in intuitive ways to wrap a template around a conical object (i.e. mug or vase). I aim to produce a vinyl decal that can be applied perfectly to a ceramic piece without any stretching.
This post is not a step-by-step procedure, but rather a general overview of the steps that I use to fit vector artwork to pieces of pottery using Inkscape and a vinyl cutter.