@leomiquelutti yes this is all correct. We have this now listed in this doc page: 3D Models – Cesium
- Your model must use local coordinates (the geometry must be centered around the origin).
- Units are assumed to be in meters.
If there’s anything that can improve that page we’re happy to hear that feedback.
I do want to add that supporting models in UTM/WGS84/other coordinate systems is something we’d like to support. I have a feature request for this documented here: Support tiling 3D models with different coordinate systems.