Get rid of streching terrain/landscape-texture

Hey guys is there any way to get rid of the streching terraintexture as seen as in the picture



I just found this by accident, and yes there is a brush in terrain section that allows you to do this, how well it works I have no idea, as its a once way trip, and according to brush tip, once done it can be it much harder ( perf. hit ?) to work with terrain afterwards.

It maybe a new brush in 4.10.2, no idea.