STL File Format STL (Standard Tessellation Language or Stereolithography) is the most commonly used file format for 3D printing. It represents 3D models as a mesh of interconnected triangles, defining the surface geometry without color, texture, or other attributes. While STL files are widely supported, they lack advanced features such as metadata or units of measurement. Errors like non-manifold geometry or gaps in an STL file can cause slicing issues, requiring repair before printing. |