Landscape material PAINT MODE Texture has a hue SQUARED. ERROR

Landscape material PAINT MODE Texture has a hue SQUARED.

Can someone help me with this one.

I have used others people pre-build layers before but i wanted to create my own and now i cant figure this one out to get smooth blending as others do.
Also i dont understand other peoples layers what i have applied before cause they are really messy.

All the help is welcomed.

change the UV scaling can smooth it

UV scaling is not changing it. ive but Landscape coordinates as scaling.