Inside the Bridge That Runs Minecraft in Elden Ring: How Do Two Games Share One Frame?
Since late September, "passthrough modding", which runs two games at once and merges them into one, has been everywhere. This post reads minecraft-crossover-bridge, the one implementation with public code, and walks through what its shared-memory protocol, depth-tested compositing, terrain raycasts and hidden stand-in character each solve, and what the projects built on it changed.