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Carmack rewriting Doom 3 source code to dodge legal issues

John Carmack is in the process of rewriting the code for id's open-source version of the Doom 3 engine, due to legal issues surrounding the shadow rendering.

According to a tweet from the developer, Bethesda's lawyers are "skittish about the patent issue" surrounding the code for "Carmack's Reverse," which is a stencil shadowing technique patented by Creative Labs and jointly created by the id legend and other coders.

id Software contracted the use of the tech for Doom 3, but providing a source code using the technique would have been a litigation issue.

No word yet on when the updated source code will be released.

Thanks, Shack.

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Stephany Nunneley-Jackson

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Stephany is VG247’s News Editor, with 22 years experience (with 15 of them at VG247). With a brain that lacks adhesive ducks, the ill-tempered, chaotic neutral fembot does her best to bring you the most interesting gaming news. She is also unofficially the site’s Lord of the Rings/Elder Scrolls Editor.

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