Need help with displacement on layered landscapematerials

Hi,

i am currently playing around with displacement on a landscape material.

For some reason, the displacement of this material (rocks in my case) gets randomly spread across the whole landscape component.

How do i restrict this tessellation to only the rockmaterial ?

I am using the material which is linked in the second link under this [video][1].
(copy&paste the text into an empty material)

I had the same problem, I fixed it by not multiplying the texture, also copying the layer blend to set all the other textures to zero, but it was the multiplier set to 1.5 causing the problem and it should be set to 1. Hope this helps.

I used this solution to ensure displacement only goes where it should.