Download the fix: 3Dfix-Montague's Mount-2014-10-14.zip
This is a quick n' dirty fix to disable the broken shadows in this game.
It also allows the HUD depth to be customised with the keys on the number row, and tilde to return to screen depth.
IMPORTANT: Use nVidia Inspector to assign this game to the Aion profile. This is necessary to allow 3D to enage since the game runs in a full-screen window and has the additional benefit of fixing 90% of the haloing issues
If you get flickering on some surfaces like the grass or the shadows re-appear, try alt-tabbing out and back in (give it a second after returning to it) or restarting the game - the Aion profile hack seems inconsistent on this game.
I haven't played very far in the game yet, so there may be issues later on in the game.