The STL file format is a format used in stereolithography software . This format was developed by the company 3D Systems. This file format is used by many other companies. It is widely used for rapid prototyping and computer-aided manufacturing. The STL file format only describes the surface geometry of an object in 3 dimensions. In particular, this format does not include information about the color, texture, or other usual parameters of a computer-aided design model.
@Coyotte The shape is not simple at all because it is an STL of an assembly
For less mystery it's a luxury headphone, whose components I have to redesign to make the "mechanical connection"
Let's say that for all the pieces I didn't have any problems because I only had the external shape as a constraint of which I was given the dimensions to respect and I had free rein for the rest. But my big problem is the headband. I have no usable odds. No bending angle and I have to go for a model designed under Bender to make the measurements.
I think the easiest solution will be to train myself on this software to try to get something out of it.
Given the shape I think that with scan to 3d as Fab said it won't break any problem, once imported you just have to use the mesh and then surface assistant
In view of the shape and especially at the level of the headband, Scan to 3D would be perfect, it will be perfectly capable of recreating the appropriate surface shapes.
Practice on a tutorial and try to reproduce it on your form.