The Valley Benchmark could not be made by Blender, Or could it?

I viewed cg geeks tutorial on overclocking. He was using a benchmark test Valley Benchmark.
It is a huge rolling scene very impressive. I think the scene must be made by some other software than Blender. My computer could not touch this scene. I am handicapped to very small sets. So seeing that this is possible makes me wonder. How I could get to a point, where I could make such a scene. But I am not changing software I know Blender. Does anyone know if the Valley Benchmark was Blender or some other software?