.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.obj
OBJ modelWavefront OBJ
A plain-text geometry format from Wavefront Technologies, dating from the 1980s. It lists vertices, texture coordinates, normals and faces; materials live in a companion .mtl file.
Moving static meshes between almost any 3D programs.
Opens in Blender, Maya, Cinema 4D, Windows 3D Viewer, Quick Look on Mac
About OBJ files