Rebuild surfaces from STL

Hello everyone, I have a shoe last as an STL file and now want to rebuild it with new surfaces. However, the surfaces must match the STL 1:1, so they must not deviate. And I need the sole at the bottom as a single surface. I’ve already tried QuadRemesh and then ToNurbs, but I only get a single surface. I’m still relatively new to Rhino, so maybe someone can give me some tips on how best to construct the new surfaces. Many thanks in advance.

Hi Mara -

The only thing that will not deviate are the triangles you get from the STL file. Anything else will be a compromise. Then again, the STL file itself doesn’t “accurately” represent a shoe last. It’s up to you to decide what is “good enough”.
Apart from that, you should always provide a 3dm file if you request help from other users.
-wim