The playfield model used in the Monster Truck demo has been scaled down and textured. A plane primitive object has been positioned at the back of the scene to provide a backdrop. Small buildings are also added to the scene.
Use the arrow keys to move around inside the scene.
Fog is an effect, not a physical object - it modifies the color of the objects inside it much like a light. You won't see fog in your scene unless there's something there for it to affect - hence the backplane. For certain colors, you can try to match the stage background color to the fog color and not worry about a backplane. However, if your display is set to 16-bit color, your hardware has to approximate your specified 24-bit color into 16 bits. The result sometimes varies between 2D (stage background) and 3D (scene geometry) objects, which may cause a mismatch for colors other than white or black. Since a backplane is a 3D object, it will ensure these colors match.
WTStage::setFogEnabled, WTStage::setFogColor, WTStage::setFogStartDistance, WTStage::setFogEndDistance