convert mesh to solid

Hi, been struggling for a while and can't figure out how to make a mold of the front face of this part I scanned. I've made them before from more boxy parts by just creating an extrusion and using a boolean remove to get the exact inverse of the face that I can 3D print. But this part is thin and I can't figure out how to…

Is it possible to convert a polygon mesh into a solid? I need to use a mesh modeling program to generate my complicated hole pattern. I have to get it into my model, and I see 2 methods: * Export my model as a mesh and do the boolean subtraction there. * Export my hole pattern as a solid and do the boolean subtraction in…

https://cad.onshape.com/documents/4e977f253699bbbd0b23d3cb/w/f8db6fb7e22a04be3f53f989/e/d00691a26c086e4508d2c4fb part studio "der2solid" I'm trying to make a part solid from a 3d scan mesh "mmGroup0" As suggested here - I've contoured edges with 3d spline, and now I'm trying to create a surface with fill command. But it…