I assume I must have seen these cave pearls many times: I've played a lot of Unreal Engine games, and whoever messed up Fortnite's news feed is hardly the first developer to ever forget a texture ...

The mod is called Unreal HD Textures 2.0, and not only that, but it also works with Unreal Tournament; since both games share assets. However, it does not address UT99 textures, so keep that in mind.

"This image haunts my dreams," said an ILM Immersive artist last year. 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.