I never worked with Unity beyond some little testing but from this small citation they refer to so called parallax mapping which makes kind of several layers/slices , totally in 2d and each slice getting certain UV shift based on texels height values. It creates a kind of depth illusion. It doesn't depend on polycount at…
I've been prototyping a game/level idea in Unity, and have been using square planes with only a single polygon (or two triangles I guess) along with various materials I'm creating in substance designer. I think I'm getting it to look fairly decent. Here's an example for one of the little hallway experiments: However I've…