The source code for Doom has been made available to the masses under the guise of a free license for the better part of 15 years now, where it is also fondly known as id Tech 1. Just when you thought that all possibilities of applying it has been exhausted, along comes Canadian construction company DIRTT Environmental Solutions (DIRTT stands for “Doing It Right This Time”) that will make us see the Doom engine in a whole new light. The company has developed a software known as ICE, which is based on the Doom engine.