Displacement not work on VertexPaint

[ionico]

Hi all, please check my test scene (attached)
I have a problem with displacement on VertexPaint areas. I painted on the plane white area
http://prntscr.com/nf05gm
I want to have material on black area and another material (with displacement) on white area
I make coronaLayered material
http://prntscr.com/nf0638
Material with displacement for white area
I'm starting render and I have no any displacement on white area
https://prnt.sc/nf06qt
Why displacement not work on white areas?

[romullus]

Displacement only works if map if plugged into base material. You can swap your materials and invert vertex colour map, then displacement will work.

[ionico]

Thanks...