In this chapter of the Materials Masterclass we’ll take a look at the World Position Offset material parameter, and make a few different material effects using it, from a pulsing lava blob to a billboard that rotates to face the camera.
https://dev.epicgames.com/community/learning/tutorials/qzEXl/unreal-engine-fortnite-unreal-5-8-materials-masterclass-chapter-10-world-position-offset-effects