The DisplacementThe process of utilizing a 2D texture map to generate 3D surface relief. As opposed to bump and normal mapping, Displacement mapping does not only provide the illusion of depth but it effectively displaces the actual geometric position of points over the textured surface. Switch node can be used to switch between multiple displacement maps (figure 1).
Figure 1: The Displacement Switch node used to connect two Texture Displacement maps to a Diffuse materialUsed for dull, non-reflecting materials or mesh emitters.