Beautiful B&W, Frank!
Yeah, there are indeed some non-supercell tornadoes (landspouts).
In fact, matching supercell lighting and shaping conditions in TG should be an really hard work, but a cumulonimbus base with just some few rotation features may not be that impossible...?
Aside from that, excellent work you are developing here; the tornado shape and texture is near to realistic!
Cheers!