Control Rig support for Sidekicks is now available with v41.20. Built on the same rig structures Epic uses internally, you can now animate Dog Large, Dog Small, and Cat Small archetypes with the same tools that power the game itself. Starting July 23, you can also publish Fortnite islands featuring Sidekicks and the new Creatures-themed assets. Remember to select the “Creatures” tag when publishing a creature-based game so it can show up in the Game Collection.
LLM conversations transform an NPC into a character capable of unscripted dialogue and interactions with players. In v41.20, we’ve added consistent voices and personas to 36 Fortnite characters when used as NPCs, with more coming over time. On July 30, conversations will exit experimental and you’ll be able to publish islands with LLM-powered NPCs and characters. https://www.fortnite.com/news/publish-islands-with-llm-conversations-starting-july-30
In-world UMG Widgets are now available, so you can drag UI elements directly into the viewport or prefab editor. New content includes the Bank Shot Pistol, Smoke Grenade, Friend Zone item, and a set of Sinister Strip prefabs and galleries.
Read the full v41.20 release notes and fixes here: 41.20 Fortnite Ecosystem Updates and Release Notes in Fortnite | Fortnite Documentation | Epic Developer Community