While investigating through the files for Project Diva F2nd (given to be my friend Dyspnia because I can't rip my copy of PDF2nd), I found something quite interesting. Parts of the video (like part of the train, the monitors, the particle effects, etc) are 3D models. Sega uses a special texture to overlap the prerendered video and the 3D models, giving us the amazing PV that we have.