Great concept! This will be a good opportunity for me to get to grips with UE4. I've started blocking out the scene, getting a feel for the geometry and figuring out the camera angle.
I really like this concept. I'm working in UDK at the moment hopefully I'll be able to get UE4 before the end of the month but here's what I have so far.
Thanks! Yeah I ditched the particles for the UE4 shot. Took under an hour to get to that stage in ZBrush. (Its my main tool.)The wall is broken into four segments, two same at front, two same at back.