Not sure if feature request or oversight, but I think I can't spot any way to set a event-added dynamic layer to 3D.
Had almost finished moving my UI onto dynamic layers but only now realised I can't switch them to 3D, even if they are sublayers of a 3D layer. Maybe I'm wrong and I haven't spotted the action to do this!
Let me know what's best, was thinking to post bug report but didn't want to file wrong type of thing.