A lot more AI characters are coming to Fortnite

AI Darth Vader was a huge hit in Fortnite, and now Epic plans to let creators make AI-powered NPCs for their own in-game experiences. But a senior Epic exec says that creators should expect a “learning curve” when using them — something Epic had to figure out on its own.

The AI Vader that Epic made lets users talk to the character using their voice and hear an AI-generated version of James Earl Jones’s Vader voice talk back. It was the “culmination of a very intense effort for a…