Alpha Geometry Tool

Whilst working on Total War: Three Kingdoms an artist requested a 3ds Max tool which would select any faces on the mesh which were assigned a material set for alpha but whose pixels visually displayed no alpha i.e. a solid surface.
Once these faces had been found the tool would then assign them a new material which mirrored the alpha one but with the alpha switched off.
The overall aim was to improve the performance by reducing the amount of alpha'd geometry within then game.