I want to add a new feature in the Blender Exporter but it seems like from this conversation that you guys do not want to have userData. I already made a pull request for tags, but I want to set more special variables specific to my project in Blender using Custom Properties. Tags is limited and I was wondering if I should try to make userData export from Blender, similar to what the Threejs exporter does. I already have part of this done here. I only implemented the export and not the import. I stopped when I saw the conversation about userData.