Billowy smoke VDB format that contains only density field. Density field has 698,295 voxels. You can also fill the vdb with particles and convert them to a mesh to get the polygon version of the smoke and make it an .fbx or .obj.
The preview renders are just examples which are simulated(Sparse Pyro) and rendered(Mantra) inside Houdini.
*IMPORTANT *= This is not an animated .vdb sequence, it is a single .vdb file. There is no animation, this is just one frame.
File Formats: vdb