Can get a smooth painting, in landscape

Im trying to paint smooth textures on my landscape using blended layers, but i wnated to the stoke to be blury/smooth, even with fallout and smmoth brush i get this sharpen stroke on my textures:

I have changed the scale of the terrain, do you think it has anything to do with it?

Did you select Weight Blended Layer (Normal) when you made the layer info? Also what does your landscape material look like?