Perspective viewport not working properbly.

my meshes (some of them imported .fbx) are not rendereing correctly in my perspective viewport and when i enable my ExponentialHeighFog evrything turns black.
Here is an example how it looks, when the camera is moving in a lit level:

anyone knows help?

Update your drivers, if it’s your graphics card.

I’m having this exact same issue right now. Have updated drivers and restarted, but still occuring. Was there ever a solve for this? Having trouble searching for it too as not sure how to describe it!

For anyone that may come across this in the future it was a smiple near plan clipping issue for me. But you have to restart unreal after changing the settings for it to take effect.