What I really dont know is if the hex from fallout is a regular hexagon viewing it from the top
About the perspective, you can try creating the famous hex and try to match it on the screen with the camera angle.
This is not needed. The exact camera position is known. There are threads about this somewhere in the NMA modding board. Shame, I can't find them right now./Edit: Found it.
Just to clarify, did Continuum used Blender?
My camera settings (C4d):Projection: parallelRotation: H: -120 P: -25.7 B: 0