source: GTP/branches/IllumWPdeliver2008dec/IlluminationWP/demos/OgreGames/CarGame/game.txt @ 3255

This demo game shows ray tracing like effects.
A reflective car can be driven in a simple scene. The scene containes reflective and refractive objects. For these effects cubemaps were used. The accuracy and computation speed of reflections, and refractions are improved with distance impostors. The car wheels cast caustic spots to the ground.
These caustics were also computed with the help of distance impostor cubemaps. With our method these caustic spots can be computed real-time also for animated caustic casters and the result is correct and believable.
        Just drive around the scene and watch the caustic spots cast by the wheels. To have more fun with caustics we added two bottles, whics can be hustled with our little car. They have different colors and cast beautiful caustics on the ground. These bottles also show nice refractions too.
        The car also has a canvas roof which has a great amount of diffuse reflection. Nice diffuse colors can be seen if we move close to something with bright colors. The track has colorful cordons to show this effect. Above the cordons there are bright colored textile tents to encrease the variety of smooth diffuse colors. Just drive pass these cordons or rotate the car near them to see the change of diffuse light. This effect convolves a cubemap to compute diffuse light, distance impostors are also used to make computation more accurate.
        If we got fed up with driving around, we can hit the explosives placed around. The explosion uses a billboard technique to render the fire, but eliminates clipping and popping effects with the
spherical billboard method. The scene is distorted by the great heat of the explosion, acchieved with a compositing technique.