Your normals are looking good, they seem to be lost on your model though. Could i see just the normals on the mesh? Also your texture looks a little rushed to me, i can spot that texture from CGtextures a mile away. While its not bad that you've used CGtextures, i do, its evident that there was no manipulation. Your AO is…
Thanks for the tips! I'm going to work more on the diffuse, maybe adding some moss or dirt on the lower area. On the other hand i will try to reduce the AO intensity, but for some reason the areas between each stone do not look good with lower AO, i'll see if i can fix that. Here are the nm only and the texture on a plane .