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Cesium3DTiles is a universal format that can contains both point cloud and tiled models.
Point cloud tiles in a Cesium3DTiles archive are presented as a set of .pnts files. If you uploading point cloud represented as Cesium3DTiles archive to Agisoft Cloud, you have to set the upload type as Point Cloud.
In this case on validation stage system will look for tileset.json file and .pnts files in archive. If there are no tileset.json and / or .pnts files are not in archive, system will throw an error.
Model tiles in a Cesium3DTiles archive are presented as a set of .b3dm files. If you uploading model represented as Cesium3DTiles archive to Agisoft Cloud, you have to set the upload type as Tiled Model.
In this case on validation stage system will look for tileset.json file and .b3dm files in archive. If there are no tileset.json and / or .b3dm files are not in archive, system will throw an error.
Summing up - when you upload a point cloud, represented as .Cesium3DTiles archive, set the upload type as Point Cloud, when you upload a model / tiled model, represented as .Cesium3DTiles archive set the upload type as Tiled Model.