I went through hell. After updating the drivers to Intel HD Graphics 5000 to the newest one under windows 7, I started to experience problems with transparent skin textures and bloom began to work improperly. The good thing was that I was finally able to change graphics settings in game and overall performance went up.
Upon uninstalling the newest drivers to my graphics card, my macbook air (mid 2014 model) loaded Standard VGA drivers and could no longer recognize that drivers to Intel HD Graphics 5000 were being installed. I finally decided to reinstall the windows 7. I spent nearly 20 hours trying to figure out once again how to do it from Mac OS, because bootcamp assistant comes with broken files and apparently Windows 7 installer has a problem with USB 3, so neither my keyboard nor trackpad/mouse was working on the installation screen.
Eventually I managed to fix the issue of transparent skin textures. I had to upgrade windows 7 to windows 10, after that I updated graphics drivers and the problem seized to be.
Other graphics problems still persist, these are flickery graphics and graphical artifacts. It doesn't really matter what settings I'm using - these problems are still there.
My MacBook Air is configured as follows:
OS: Windows 10 64-bit
System Model: MacBook Air 6,2
Processor: Intel Core i7-4650U CPU @ 1.70GHz (4CPUs), ~2.3GHz
Memory: 8192 MB RAM
GPU: Intel HD Graphics 5000, 2GB RAM
Directx 12
Any idea how to fix these other graphical problems?