There is only one file type that uses the .VDB extension:
OpenVDB Volume Database File
A VDB file is a volume database file created by OpenVDB, an open source C++ software library used to create special effects in DreamWorks animated films. It contains data used to simulate volumetric effects, such as clouds and smoke, or represent a surface, such as water.
OpenVDB is used by various feature films, short films, and TV series. Some of the titles include How to Train Your Dragon 2, The Croods, and Puss in Boots.
|DreamWorks Animation OpenVDB||Free|
Updated: January 1, 2018