Graphical (mirrors ?) bugs

Hello. I don't know why these bugs and how to remove them ? Is it drivers problem ?

I run rFactor 2 on a nVidia GTX970. It doesn't occur on every tracks or cars. Very strange. It's ruinning immersion and replays.

 

It's something to do with the heat effect coming from exhausts... can't remember how to turn it off.

 

Thanks ! I think you right.
I found this thread https://forum.studio-397.com/index....-instead-of-heat-haze-or-exhaust-fires.46059/