cybereality Both modes could work, but you need to pick one. First person requires more detailed art, you can get away with lower end assets in third person.
Not only the camera changes, but also the control. At the same time you can change the quality of textures. In fact, you will have to make two games - this is the main difficulty. But, if you want, you can make two (and more) cameras (and, accordingly, the style of the game).
