In this video I cover the basics of the Jump Flood Algorithm (JFA), and how to make the effect in Unreal Engine. This version uses a single Render Target, unlike other similar tutorials.
Ben Golus’ Post on the subject: The Quest for Very Wide Outlines. An Exploration of GPU Silhouette… | by Ben Golus | Medium
Shadertoy version: Shader - Shadertoy BETA
https://dev.epicgames.com/community/learning/tutorials/B7yV/unreal-engine-unreal-5-3-the-jump-flood-algorithm-or-how-to-make-wide-outlines