I need to download the latest version that was submitted to MPEG for the file and serial data format and get it on OTOY.com like the 1st doc (intro PDF) linked in my post above. Will share a link as soon as that's done. The container and stream are just one layer, the full node schema and module system is mapped out on docs.otoy.com for users and developers.

We're working on a flat C API for ORBX script nodes which will (we hope) leverage WASM+WEBGPU/VK to add novel functionality within the node graph itself instead of needing it to be in an arbitrary external renderer. This was how we first implements ORBX1 video in pure JavaScript back in 2013

Note that Graphs can further 'render' a scene to valid glTF/mesh and volume formats, not just texture/image output buffers.

I don't think glTF will be able to fully replace alembic/FBX soon in the schema sadly, based on last KHR discussion at siggraph (I understand the reasoning, do not going to advocate they change it); glTF is still a useful asset format for proxy volumes or baking to webgl pipelines.