Unfinished Doom 3 monsters

Several Doom 3 monsters, characters, and art designs were cut in the development process and did not make it into the finished game. Id Software first experimented with sculpting and scanning VS modeling but the data was dense and unwieldy, so they abandoned it pretty quickly. Various concept designs of these monsters were shown amongst the pre-release Doom 3 promo material. One of them was a new version of the Arachnotron and Spider Mastermind (seemingly cut in favor of the other new arachnoid monsters Trite and Vagary) while the rest were apparently new designs. Eventually some of the unfinished monsters were finished and used in the Doom 3 expansion, Resurrection of Evil.