A non-animated VDB tornado effect in two parts meaning the bottom and the body are separated.
The body has only density field with 16,356,014 voxels. The bottom part also only has density field with 14,000,119 voxels.
You can also fill the vdb with particles and convert it to a mesh to get the polygon version of the smoke and make it an .fbx or .obj.
The preview renders are just examples with different lights, density(inside the material) and color values.
*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