Mesh To Solid for AutoCAD is a polygon mesh to 3d solid conversion plug-in for AutoCAD. This plug-in gives AutoCAD the ability to convert a mesh into a solid. Mesh To Solid for AutoCAD adds several commands along with a menu which houses them. Mesh To Solid for AutoCAD can read mesh objects from the following file formats: Stereolithography files (*.stl) Wavefront files (*.obj) OpenNURBS files (*.3dm)