A Fortnite player wondered why there was 'mold' in their game: turns out it's a texture Tim Sweeney added to Unreal Engine in 1995

(Image credit: Epic Games)

There's a growing field that I like to call 'digital archeology': the excavation and analysis of weird artifacts that have become buried in decades-old software or only exist on archived websites. Sometimes those artifacts just rise to the surface on their own, as was the case with an image of "mold" spotted by a Fortnite player in the game's news feed.

It isn't a picture of mold, but a stock photo of "cave pearls, a kind of calcium carbonate deposit that forms in limestone caves," Epic Games founder and CEO Tim Sweeney said on X in response to the question from M1das.

This is Unreal Engine's default texture. I imported it into Unreal Engine 1 in 1995 while I was developing on a 90 MHz Pentium. It's still there and shows up when a programmer forgets to specify a texture.November 14, 2024

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Tyler grew up in Silicon Valley during the '80s and '90s, playing games like Zork and Arkanoid on early PCs. He was later captivated by Myst, SimCity, Civilization, Command & Conquer, all the shooters they call "boomer shooters" now, and PS1 classic Bushido Blade (that's right: he had Bleem!). Tyler joined PC Gamer in 2011, and today he's focused on the site's news coverage. His hobbies include amateur boxing and adding to his 1,200-plus hours in Rocket League.