![]() ![]() Rather than using a simple "use key", the crosshair acts as a mouse cursor over the screens allowing the player to use a computer in the game world. To increase the interactivity with the game-world, id designed hundreds of high-resolution animated screens for in-game computers. ![]() To create a more movie-like atmosphere, id interspersed the gameplay with many in-game animated sequences of monsters ambushing the player or just lurking around. A shortcoming of this approach is the engine's inability to render soft shadows and global illumination.Īs well as dynamic lighting and shadows, the Doom 3 engine was id Software's first to make extensive use of bump mapping. This allows lights to cast shadows even on non-static objects such as monsters or machinery, which was impossible with static lightmaps. By contrast in the new Doom 3 engine, most light sources are computed on the fly. ![]() All 3D engines up to and including Quake III and Unreal Tournament had computed or rendered lightmaps during map creation, saving that information in the map data, which made the lighting extremely static. The key advance of the Doom 3 graphics engine is the unified lighting and shadowing.
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