Landscape visibility doesn't work

I followed a tutorial to make a hollow hole to landscape, but when I link the “Landscape Visibility Mask” to the attribute, nothing changed and I still could not use landscape visibility.
Please Help and thank you guys.

The Chinese at left side means “You must add Landscape Visibility Mask node to the material to toggle the funtion of painting visibility”

I knew now. I need to apply the same material to the “hole material”