.3ds
3DS model3D Studio
The scene format of Autodesk 3D Studio for DOS, from 1990. It stores meshes, materials, lights and cameras, but each mesh is limited to 65,536 vertices.
Older 3D asset libraries and models shared before modern formats arrived.
Opens in Blender, 3ds Max, Cinema 4D, MeshLab
About 3DS files.3mf
3MF model3D Manufacturing Format
A ZIP-based 3D printing format from the 3MF Consortium, founded in 2015 by Microsoft and others. Unlike STL it keeps units, colours, materials and several objects, and can carry print settings.
Ready-to-print projects with colours, multiple parts and printer settings.
Opens in PrusaSlicer, Bambu Studio, Cura, Windows 3D Builder
About 3MF files