just looking at this is killing my pc :/

"buddy, that isn't tessellation. That's Parallax Occlusion Mapping. Looks like heavy tessellated mesh, but is not. The geometry is simulated by displacing the pixels from the textures. You can confirm this by Disabling tessellation in options, but keep the graphic detail on very high, and this would look the same as it is now"

You're right! DAMN that is good ssom, I swear I thought it was a geometry displacement map. They even got external shadows to fall on it correctly. Time to go shader hunting.

buddy, that isn't tessellation. That's Parallax Occlusion Mapping. Looks like heavy tessellated mesh, but is not. The geometry is simulated by displacing the pixels from the textures. You can confirm this by Disabling tessellation in options, but keep the graphic detail on very high, and this would look the same as it is now.