.ply
PLY modelPolygon File Format
The Polygon File Format, also called the Stanford Triangle Format, devised at Stanford in the 1990s. It stores vertices and faces with extra properties such as per-vertex colour.
3D scans, point clouds and research data.
Opens in MeshLab, CloudCompare, Blender
About PLY 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