I3S enables the streaming and storage of arbitrarily large amounts of 3D geographic data. I3S is web and cloud friendly and is rooted in modern standards and technological advancements in the areas of 3D graphics, data structuring, and mesh and texture compression. Version 1.2 of I3S includes support for supercompression of texture data using Basis Universal Texture supercompression in the Khronos KTX 2.0 texture container format, and advanced physically based materials that are feature compatible with the Khronos glTF 3D asset format standard.