Frustration - "Black" materials from my textures

Hi Construc_ - I’ve added a LIV to the scene, rebuilt everything (I had actually tried that after reading some hits from my searches yesterday) and it’s still the same way.

Thing is, if I remove the metallic texture input, the object is no longer dark as shown but then of course I lose the metallic attribute that I require. Replacing the map with a Constant set to 1.0 does the same thing.

I’m using an NVidia GTX980 in my system w/the latest drivers, I’m wondering if I should totally uninstall UE4 and reinstall it from scratch at this point?

The Specular, Emissive Color and the Pixel Depth Offset inputs are disconnected - do I need to wire them to any degree, especially the Pixel Depth Offset? Not sure what that one is for?

Edit: Okay I just created a new scene (FPS Blueprint) with v4.9x - I’m importing a .OBJ model, and the import warning dialog it says “Warning: No smoothing group information was found on this FBX scene. Please make sure to enable the ‘Export Smoothing Groups’…”

Now again, this is an OBJ, not FBX models, but I’m wondering if the lack of smoothing groups may be part of the issue?