Doom (1993 video game)
Doom (typeset as DOOM in official documents and stylized as DooM in other media) is a 1993 first-person shooter (FPS) video game by id Software. It is considered one of the most significant and influential titles in video game history, for having helped to pioneer the now-ubiquitous first-person shooter. The original game was divided into three nine-level episodes and was distributed via shareware and mail order. The Ultimate Doom, an updated release of the original game featuring a fourth episode, was released in 1995 and sold at retail.
Doom 3
Chris Vrenna and Clint Walsh, known together as Tweaker, were hired to work on the theme music for "Doom 3". Walsh was credited as composer while Vrenna was credited as producer.
According to John Carmack, the lead graphics engine developer at id Software, the technology of "Doom 3" was supported by three primary features: unified lighting and shadowing, complex animations and scripting that showed real-time with fully dynamic per-pixel lighting and stencil shadowing, and GUI surfaces that add extra interactivity to the game. The key advance of the id Tech 4 graphics engine developed for "Doom 3" is the unified lighting and shadowing. Rather than computing or rendering lightmaps during map creation and saving that information in the map data, most light sources are computed in real-time. This allows lights to cast shadows even on non-static objects such as monsters and machinery, which was impossible with static non-directional lightmaps. A shortcoming of this approach is the engine's inability to render soft shadows and global illumination.