This architectural visualisation was initially modelled in the classic 3ds Max environment and rendered with V-Ray.
In the next step, the scene was ported to Unreal Engine 4 for VR. This also allowed comparisons to be made between real-time ray tracing in UE4 and the physically correct rendering from V-Ray.
The rest of the environment consists of a stereo 360° panorama, while the architecture was implemented in real time.