While id Tech 3 is based on id Tech 2; a large portion of the code was rewritten. Successor id Tech 4 was derived from id Tech 3. id Tech 3 originally debuted with Quake III: Arena and was further extended and enhanced during the developments of Quake III: Team Arena and Heavy Metal F.A.K.K. 2. id Tech 3 introduced some state-of-the-art features back when it was developed. Some of them were the support of a shader system, loading character models in three parts for more flexible animations, and last but not least, a hardware accelarated renderer. This required the users to upgrade their PCs, a trend that would repeat itself over the next decade, time and time again. id Tech 3 used the gtkRadiant editor.