This is Parallax Mapping material and node setup. Created in Blender 2.8 for eevee renderer. It works well in cycles too. Video instruction included, with bonus of making parallax ice shader short tutorial.
WARNING! Works well on plane surfaces. Watch instruction https://youtu.be/ZL695WnJvmU before buying for information about limitations and issues of my method!
Update PX Mapping v1.4.2
1. displacement map node can be edit from root of the material;
2. add rgb tweak node, requierd if you need invert Red or Green color channels of normal map, sometimes it is necessary for correct work of normal map textures in blender.