High Poly Rock -vs- Low Poly Rock
0-Baked the Normal Map from the high poly and wrapped it on the low poly.
-Also baked the Ambient Occlusion, Color Map, and Roughness Maps
-There are slots in the PBR and older 1.0 materials for them, depending on which ones you use.
Was going to make another World Editor 2.0 for Dummies and it will be on textures in the next few days. Will cover this in it. How to do it. This was something I had not been doing for my high poly track stuff. Instead decimating things till they start looking almost like crap and using that model. No need any more, get advantage of low poly mesh with a high poly look. Its a little time consuming. I will only be baking stuff for a few track objects. Likely the ones that will get most attention. Larger stuff. But it works fine on anything you want to spend the time baking. Takes about as long to bake something as if you rendered it without anything else in the scene. Not bad. Just have to render a few passes for each layer and save them each.