There is only one file type that uses the .V3V extension:
Vector Art 3D Model File
A V3V file contains a 3D model that can be viewed using Vector Art 3D Viewer, a free program for Windows used to view 3D models. It stores a preview of a 3D model that is smaller in size, ranging from 100KB to 1 MB. V3V files may be used for a variety of 3D models, such as animals, symbols, decorative pieces, pictorials, and signs.
|Vector Art 3D Viewer — Discontinued||Free|
Updated: April 16, 2018