Irrlicht Engine

I only say USF

Sorry, have now seen that i wasnt logged in.

If you design an aplication or a game you should take a pen and some paper or open a texteditor. Then write down how the app/game should work. Write down every step. and i mean realy every also if the step will be repeated.

Example in one window:
Starting App
show main menu
choose level
hiding ...

Before you make a basic copy, think what you want to add later else you could run into problems.

As the orginal game is based in a "room" adding vehicles would be hard if you also choose that your game is set into rooms.

So here now how i would make it:

Scene: Puting the Game into an Outdoor ...

@Club

If you want to have every person with a specified way and its own story, it will be dificult, as the cpu-power is limiting the number.

But if you only want that it "looks" lika a very populated city you can do it with a trick. As you have said only render the People (NPC's) if they are in ...