Volumetric 3D objects from sprite sheet

Is it possible to create a cloud like volumetric 3D object with a sprite sheet that has all the slices, or just an array of textures?
The only example I could find only ran in play mode, had to do it with a script, didn't have a proper depth data to interact with the scene around and only allowed additive blending.

Apparently Unreal 4 engine was capable of displaying and even modifying volumetric objects more than a year ago. I'm wondering if there's a way to do this in Unity.