Finally had some time to make a stone floor. I created a base mesh in 3DS max using Stone Placement Tool script. Then I brought that mesh into ZBrush and started to sculpt away the hard edges. Then I decimated the mesh and brought it back into max for unwrapping. Various maps were then baked out using xNormal and then I composited them in Photoshop. Could use some more tweaking before I'll consider this done, but this render turned out pretty good so here's a preview.
2k textures rendered in 3DS Max. 3,292 tris and is double sided; as in top and bottom are unique for added modularity.