Cool scene renapd.
I still use P4 figures. The main issue is setting materials to make them look good enough..With proper clothing and accessories they are prefect background characters. I once managed to put 50 of them in a scene. I also use Lores characters which I purchased from Daz but P4 has the advantage to have a bunch of preset poses so they take fewer time to pose.

Yarp - author of P3DO Organizer for Poser