Don't know why you were downvoted. Doing e.g. dataset -> .vtk file -> ParaView to add whatever vectors, color maps, surfaces etc. you want -> .obj file -> Blender to do final lighting, coloring and raytrace isn't unheard of. I've seen it done several times in CFD, and I've done it myself.

It becomes a bit of a pain for animating datasets, since you need to do Blender scripting with Python which is far from intuitive. But it's doable.

Having said that, this doesn't look like Blender.