Terrain Texture Stretching

[tyFlow]

Very steep cliffs like that in any height-map based solution will always appear stretched, because there's no height information in the coloring. You can minimize it by either a) increasing overall terrain resolution, b) reducing steepness of cliffs or c) adding some erosion to break up the streaks. Of course, doing some triplanar texturing of whatever is a possibility, but outside of the scope of tyFlow's terrain tools (you'll have to apply that after to the exported terrain mesh).