How to remove default sheen?

[vershner]

It's not how they look within Wings that I care about. It's how they look when exported. I just enabled smooth preview to demonstrate it.

When I create my own material it still has the shininess and none of the settings seem to affect that. What is PBR one?

Also, when I import a cube from Blender then apply a Wings material to it, it remains matte. It doesn't go shiny like the native cube. I can even assign the same material to both of them and one will stay shiny and the other will stay matte.