I had a complex model that I created in Blender 2.79, and imported (with some tweaking) successfully to Unity 2018 a few months ago. When I switched to Blender 2.8 and Unity 2018.2, I found big problems with my model.

Blender 2.8b tells me that all the normals are exactly what I expect — the blue shows all the normals are pointing outside, as they should.

But these 2 screenshots from Unity 2018.2.19f1 show the normals are all off.

I’m using Unity’s “import normals” option. I tried letting Unity recalculate normals, but that didn’t solve the problem.

What am I missing?

On a Unity forum, hippocoder said the problem was I set the mesh to render transparent, and suggested I try an opaque shader pass…

Here’s what the material looks like in Blender (no transparency)…

…but perhaps there’s something to adjust in Unity. Looking.

Yes, indeed, now I see Unity imported all my Blender materials as transparent. I’ve replaced the brass and wood with non-transparent materials, and the hook is rendering correctly. Thanks, hippocoder!