Made a layout on WE2X that heads in towards the roundabout that leads to the tunnel that goes under the track (see image below), and while driving, road and some of the surrounds suddenly went blue.



Same thing happens everytime I go this route.

No problems with car falling through a hole or anything, and at speed, it's just a quick blue blur.

I saved an mpr; I slowed down at the 40 mins mark to see it better.

It happens for me too.

Watching your replay i saw nothing of that blue ground since i believe this is a personal issue/bug which has to do with your pc or graphic settings.