Site-scale immersive 3D for ultraweb builds — ONE persistent R3F canvas behind natively-scrolling DOM, surviving every route; a DCC-authored camera clip scrubbed by a journey map (route window x scrollYProgress -> mixer.setTime), material-names-as-API, patched stock materials over hand-written GLSL, punctuation-only postprocessing, and a gltf-transform/DRACO asset pipeline.
