Creating the 3D scene: Polygons are hard for the computer to draw fast, so the less polygons, the better.
My game takes place in an arena setting, with an audience.
I will use DirectX to draw a floor rectangle:
I will then add 5 rectangles to make a box on top of the rectangle. This will be the cage on top of the arena.
I will then add a diagonal rectangle to the side. This will be one grandstand for the audience.
I then add the other three sides:
This is my 3D scene. The tan indicates where the audience textures will be located, the green where the floor textures will be located. The inner box will be textured with chain textures.
This is an idea of the finished scene, with rudimentary textures:
The words say 'Robot Arena', if you look closely...