Doom 3‘s source code was scheduled for imminent release, but a potential legal hiccup is holding the launch back, ShackNews reports.
Lawyers have spotted some possible problems surrounding the game’s rendering techniques named ‘Carmack’s Reverse’. It’s a stencil shadowing technique that was initially invented by several different people but owned by Creative Labs. The devs used the system in a deal that meant they didn’t have to pay Creative, but releasing it as open-source could be a problem. As such, industry legend and id father John Carmack has to work rewriting the code for the system.
Carmack explained via Twitter: “Lawyers are still skittish about the patent issue around ‘Carmack’s Reverse,’ so I am going to write some new code for the Doom 3 release.”