Landscape Distance Fields Artifacts

Hi!

I use Distance Fields so chage water color near surface and it work with artifact. It always hapend in the same place. From big distance this artifact dissapired, but from clos distance I always see squere.

I sure it not problem of water material. I tried test material with other mesh and saw same square in same place. So I think this artifact casted by landscape.

I tried find solution on forum but without success. Looks like this problem started from UE 4.8 and still not fixed.

Maybe I do something wrong. Any Ideas/advice how to fix it?

My grafic card: GTX 1060 with latest drivers

Did you find a solution ? I also have artefacts like yours on my water plane. Nothing is close enough. It it checking distance to it’s own surface ?!