First Map or Develop ?

Hi guys . I want to make an open world game .so i have a question . Can i start with the map design before the developing? Please give short answers, thank u all …

Don’t waste too much time on a open world map when there’s a lot that might change as you develop your project.

You’re probably better off quickly using some procedural generation or real world data and grey boxing areas.

No, that would be a waste of time.

Your first level should be a test room with all characters, weapons, enemies etc… in one small map. Once all these things are working properly, THEN build the world and populate the world with these objects that you tested in your test map.