Ciao Giampaolo It is a know issue a you might consider reading the answer in
this 3d https://devsupport.flightsimulator.com/t/3348 But since su11 beta
you can enable the new ground terraforming method (the old one is enabled by
default) in options/ground/old terraforming, it will increase the terrain
resolution and hopefully remove the jagged edges Hope is gonna be standard in
su12