.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.gltf
glTF modelGL Transmission Format
An open 3D format from the Khronos Group, first released in 2015. A JSON file describes the scene and points to separate binary buffers and texture images.
Exchanging real-time 3D scenes with materials and animation between tools and engines.
Opens in Blender, three.js, Godot, Unity and Unreal (with plug-ins)
About GLTF files