Oh yes I've used that script however I've noticed that it has problems with continuing quads. Good example would be a plank. Try creating a single plank with beveled edges. Then add a couple of edge loops. Then try the script again.
I think I missed a question related to the rocks. The rocks aren't custom baked assets they are static Geo with tiling textures. Specifically a four layer blend blending from three rock types and a witness drip layer. The game actually uses a normals modifier tool that was custom script for Maya allowing us to manipulate…
Thanks for answering my question! It's exactly what i suspected. I use this script for 3ds max: http://www.mathieujacquin.com/2013/11/24/maxscript-average-normals-v2/