As opposed to Bump and Normal mapping, Displacement mapping provides the illusion of depth, and it displaces point positions over the surface based on the displacement texture's light and dark values. The Displacement node controls how the texture displaces the surface. Displacement mapping requires a UV projection for the object with the displacement. Models created in other 3D applications need UV texture coordinates, and the displacement map should match the model's UV layout. There are two types of displacement nodes available in Blender, Texture Displacement and Vertex Displacement (figure 1).


Displacement

Figure 1: Octane Displacement Node List