Nice demo. On Windows 11, MS Defender quarantined the executable reporting that it detected Trojan:Win32/Wacatac.B!ml. It had no problem with the Terrain3D library, only the Godot executable. Might be an issue with Godot 4.2.
Malwarebytes saw no issue and I ran the demo fine once retrieving the executable. Malwarebytes & Defender scans afterwards reported no issue.