So I found the windows on the M7 to have a very strong dark tint and decided to brighten them up (50% of the original Alpha Channel Opacity exactly). Additionally I've removed shadow casting from the Cab Light for improved performance. (As the lamps are covered by a diffusor it is more realistic anyway.) Before: After: Enjoy!
Thanks for all this fix, helps to gain a few more fprs in game and improve the run in Tsc to be more smoothly