Materials without a smooth transition

Recently, I encountered a problem: my materials do not have a smooth transition to another.
At the same time, on other maps there is a smooth transition.
For example, Polish Roads V2:


And a broken map:


What should i do? I hope you can help.
--- Post updated ---
wrong topic

 

You need to learn the fine art of Decal Blending my friend

 

I made a video giving a few examples of blending with decals

 

Thanks for reply, but I think this is not the solution to my problem, because the blending should be directly in the material, not in the decal. I made this blob myself, without using decals, and it has a transition, but my map doesn't. Thanks again for the reply.

 

The PBR terrain paints frazzle the edges of the terrain paint that somewhat is diffused. Its not great. I feel they should have better blending for
us hand painters. The blending works fine though if your using a proper basemap for your terrain paint. Where basically the entire texture seen far away is the map. I personally prefer to hand paint.