Looks like I am the only one completely fascinated by this!!
Couple of screen shots:
What they determined was the walls and ceiling were not straight, they were slightly curved. The complete chamber was all curves with no straight lines. Also polished to a glass like finish. When the left side was superimposed over the right side, out of 44M points, 62% of them were EXACTLY in the same place. So a curved surface carved out of solid granite in the dark, is virtually symmetrical. And not just one cave, there are several in the region.