Hello @cedrickw ,
Currently the default credits widget needs to be used or otherwise an equivalent attribution UI must take its place. Attribution for the data sources must be accessible from the main window (this is the case with the default credits widget). The Cesium Ion attribution needs to be shown on the main screen unless targeting mobile platforms or otherwise under a custom agreement with Cesium (Terms Of Service – Cesium).
That being said, we are currently working on relaxing these attribution requirements to better fit into the game industry. We will make an announcement when we are able to do so.
Thanks for your interest in the plugin!