Blur/ghosting in motion and grainy mesh..

Greetings UE Community,

This is my first post, and I hope you’ll be able to help me!

I recently added some meshes from FAB to try and build an environment. However, the cliffs, one of them shown in the images below, suffer from this weird grainy artifact when moving across them.

I’ve tried various suggestions via this community.. A few of which were to mess around with the Anti-Aliasing settings, disable Lumen, look at MipMap; however, all of them to no avail.

Hope you’re able to help in figuring out what this could be!

Thanks in advance!