Hello, I just started my Rhino trial in effort to convert my Mesh based object into a Nurbs kind of object. For some reason, guy who works in 3D printing shop asked for .stp/.igs file type. So I ended up trying to convert this in Rhino.
Can somebody help me with this process? Right now what I did was to go to the Mesh Tools > Convert Objects to Nurbs. This indeed converted my mesh into the polysurface the way I need, but since my mesh object was lower in resolution, the polysurface creation is now quite jagged and rough all around. My question is how to make this smoother if possible? Or, if you have any other ideas about how to do this process properly, please let me know.
T-Splines does not exist anymore for Rhino, it was bought by Autodesk and is now a part of Fusion 360. T-Splines would in fact be the way to go. Rhino 6 has some sub-D tools but they are beta and hidden (search subD on this forum). There are also some plug-ins like Mesh2Nurbs and Clayoo
Ah, there is a Rhino built-in command “MeshToNurbs”. This command simply converts quad faces to 4-point quad surfaces and tri faces to 3-point tri surfaces. So basically what it does is to just mess things up, but sometimes it works in some cases that only accepts NURBS surfaces. Again, this command is not an option in most cases, but it’s up to you if you want to give it a try.
It it typically much easier to modify CAD surfaces for print issues, wall thickness, shelling, etc or just to save the STL model with a different resolution.