This repository hosts the specification for Scene Layers which are containers for arbitrarily large amounts of geographic data. The delivery and persistence model for Scene Layers, referred to as Indexed 3d Scene Layer (I3S) and Scene Layer Package (SLPK) respectively, are specified.
https://github.com/Esri/i3s-spec/issues/131 https://github.com/Esri/i3s-spec/issues/135