I’ve tried DX12 with BML. It gave me a huge improvement in FPS (moving it from almost unplayable, to very smooth). Unfortunately almost every time I switch to a view outside the cab, it crashes. The improvement from in-cab is so big that I’ve actually stuck with DX12 and just never use the outside views (which were never a big thing for me anyway). When I drive any other route, I switch back to DX11.