STEP vs STL: Which File Should You Upload?

STEP

• Exact mathematical surface definitions.
• Units are stored in the file.
• With us: the original is kept for production, and a mesh is generated for preview.

STL

• A triangle mesh – curves are approximated.
• No units – export in millimeters.
• Resolution too low – faceted curves; too high – a large file.

OBJ

Common from 3D modeling software; like STL, it is a mesh.