How to apply node displacement to geo / how to stick object to the ground?

Support Modeling
1

Hello, I am trying displacement workflow in Blender and stuck with two issues:

  1. How to apply displacement to geo that I used in shader editor for cycles render? Displacement modifier won’t help here because I mingled several displacement maps and changed texture coordinates.
  2. How to stick objects to surface with displacement? I have some items lying on the plane, but displacement changes geo and objects begun floating in the air or sunk in the ground.
    Thank you in advance.
2

Displacement in the node editors are there just to pretend there is a geometry. So if you want to stick other objects onto the surface that is made by displacement, you need to use modifier and apply that change to make a real geometry.