I’ve been modelling an aircraft of my own. At a given time the windshield stopped being completely transparent, and now it looks more like tinted glass. You can see the material properties on the right, and as far as I know there is nothing there that should make it look so opaque to light. Let me state here that I am still a beginner with blender, so I don’t know what all buttons do.
The object is just a simple mesh with a subsurf and solidify modifiers. Any idea of what is making it so dark?