Materialise incorporates more than 25 years of 3d printing experience into a range of software solutions and 3d printing services for medical and manufacturing. This surface tessellation language describes and represents the surface of a computer generated object cad file. Stl And Obj Files 101 Exporting Viewing And Repairing Guide 3d Stl has several after the fact backronyms such as standard triangle language and standard tessellation language.