Doom III Features
In general, some of the features of Doom III are dynamic shadows, per polygon hit detection, multi dynamic light source, and a new physics engine. The new physics engine can be applied not just to the characters in the game, but to the objects in the game as well. So, for example, you could kick a box on the floor into the air and you get the realistic effect of the box falling to the ground. This physics engine was pretty impressive and something that adds a new dimension to Doom III.
In the one player mode, the Doom III game is very mission and story driven. You will be able not only to activate computer consoles in the game, but, for the first time, to interact with them with HTML-style screens on the computer that will allow you to click on them.
Each custom model starts life as a sketch. This sketch is moved into Lightwave and can be as rich as 800,000 polygons. Once this is completed, a low polygon count is wrapped around the model and the Doom III engine is able to render bump it. Detail is then transferred in from the high quality image model. Painting the model then takes place and the internal control skeleton is built. Doom III has a complete full skeleton animation system.