danieleman From the picture I can't really tell what is wrong

I do see your running Win10, correct?
First some basics, your running Win10, but what are your system spec's? Your not using a graphics chip set, but a dedicated video card, correct ?
Also, are you using FPSC V1.20, Black Ice mod, or something else? Next, remember fpsc is DX9 so a fresh install of DX9-c wouldn't hurt.
Last, the Black Ice mod comes with extra .dll's so it runs more smoothly in Win10. It is also HD and uses a resolution of (1280x720).
So if you are already using Black Ice maybe that's the "weird" thing your seeing ???

My games never have bugs. They just develop random features..
Lots and lots of random features...