So now that I tested 4.23, I can safely say that the “fix” by Epic didn’t really help. While it removes some of the shadow artifacts, it adds some on other parts of the terrain / mesh. Like II_ADN_II said, the results are very inconsistent.
What’s worse is that dynamic shadows now seem to be completely broken on landscape terrain in 4.23, I made a topic about that: https://forums.unrealengine.com/unre…n-on-landscape
Also if I use Shadow Slope Bias, it makes static mesh shadows very unrealistic as can be seen in this picture:
The only way to fix this is to set “Nu(mber) Dynamic Shadow Cascades” to a maximum, but that “adds significant render cost”.