Variable amount of properties determined at runtime

[joseph (J)]

You need a CollectionProperty:

Add multi UI props

You’re probably looking for a CollectionProperty. They’re basically Blender lists that you can use to have multiple instances of the same property. There’s some more info here: https://docs.blender.org/api/current/bpy.props.html#collection-example And here: https://stackoverflow.com/a/71929072/18864758