Duck & Fox: https://github.com/KhronosGroup/glTF-Sample-Models Cesium: https://github.com/CesiumGS/cesium/tree/master/Apps/SampleData/models https://github.com/CesiumGS/cesium/tree/master/Specs/Data/Models FlightRadar: https://github.com/Flightradar24/fr24-3d-models Kenney: https://kenney.nl/assets?q=3d Smithsonian: https://3d.si.edu/cc0?edan_local=&edan_q=& AssetGen: https://github.com/KhronosGroup/glTF-Asset-Generator