QUESTION No visibility from cockpit

[GRLap]

I'm tinkering with a car Mod, mostly exterior body mesh. I did not touch the windscreen. The windscreen has an exterior, interior and damage object layers.
In KS Editor and in AC Content Manager, the windscreen is transparent from the cockpit (pictures below). But in-game the cockpit view is obscured by a grey cloak of doom! It almost looks like the windscreen may be transparent (because the hood is visible) but there's a cloak of grey doom covering the car! Honestly, WTH? The exterior view in-game from the pits looks absolutely fine.
Has anyone ever seen this?
I exported using AC-CM, edited the .fbx with blender, and exported the .fbx to kn5 using KSEditor.

view from within ks-editor

cockpit view within AC-CM

outside view within AC-CM

cockpit view in-game

 

[WalkerAW11]

In kseditor, do you have the window mesh set to transparent and the material for it set to alpha blend? Some cars have multiple windscreens in the same place for dirt etc, it can be easy to miss the extras and leave them on opaque.