glTF Exporter:

1. Open a 3D view of the project you want to export.

2. Set up the visibility of elements (only visible in view elements will be exported).

3. Launch the add-in, set options, and press the export button.

4. The output folder will open automatically after export completion. If there are issues "export.log" file is created. You can open it in any text editor to examine.

To make use of glTF export functionality in your Autodesk® Revit® add-in project find GS.Revit.GltfExporterAPI.dll under %ProgramData%\Autodesk\ApplicationPlugins\glTF Exporter.bundle\Contents directory and follow instructions on screenshots. You need to pass your personal user ID to validate the license before starting the export.

The installer that ran when you downloaded this app/plug-in from Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10) and uninstall as you would any other application from your system.

Below is the link to sample files exported with glTF Exporter:

https://yadi.sk/d/fneLTgmdFBpbww?w=1

For some models merging LODs and compression options don't work simultaneously. Use one of them at a time for export to succeed.