Cesium for Unity offline RenderTexture recording does not include ion credits / attribution UI

Cesium for Unity
1

Hello everyone,
I am using Cesium for Unity together with a custom offline recorder system in Unity.

My recorder works roughly like this:
cam.targetTexture = rt;
cam.Render();

RenderTexture.active = rt;
tex.ReadPixels(…);

I then export the captured frames as PNGs and encode them into MP4 using ffmpeg.

The issue is that the normal Cesium ion credits / attribution UI that appears in the Game View is NOT included in the recorded frames.

Important observations:

  • The credits are visible in the Unity Game View.

  • They remain visible even if the Main Camera is disabled.

  • They do not appear to be rendered through a normal Canvas.

  • FindObjectsByType<UIDocument>() returns none.

  • Resources.FindObjectsOfTypeAll<CesiumCreditSystem>() does find internal Cesium credit objects.

  • It seems the credits are rendered through an internal UI Toolkit panel / overlay system that is outside the camera render pipeline.

Because of this, Camera.Render() output does not contain the credits.

I would like to ask:

  1. Is there an officially supported way to render the Cesium ion credits into a RenderTexture / offscreen camera capture workflow?

  2. Is there a recommended approach for offline rendering / frame-by-frame video export while remaining compliant with attribution requirements?

  3. Is there an official Cesium ion logo asset or recommended compact attribution layout for rendered videos?

Currently I am considering manually recreating the credit overlay UI, but I would prefer to use the official system if possible.

Thank you.