Trying to steal Vray's thunder.
I'm gonna wait for Steam version
CG Spartans has shared a pack of free Parallax Occlusion master materials, and high-res stone textures for Unreal 4. You can use the set to add depth to the surfaces in your scene, seamlessly blend between multiple texture layers, or add puddles to your materials with vertex-blending.
Interested in quickly testing out some Parallax Occlusion Materials in Unreal Engine for free? I’ve made it easy, just download the project and watch a 2 minute long video that explains how to get them set up.
Once installed, you’ll have the option of blending between multiple sets of textures, and also blending puddles that conform to the shapes of your textures.
The pack also includes 3 high-resolution stone texture sets (height, normal, albedo, roughness, AO, metallic passes for each).