Second Camera does not call onLeftPickTrigger Action

Bugs
3

Not sure how to achieve this Blender style axis handles because currently:

  1. To show the axis a second HUD camera is required to be in the scene.activeCameras list as the last camera in order to render over the main Camera
  2. This results in scene.activeCamera always get set to the second camera => leading to all picking events, and Gizmo breaking
  3. But without adding the second camera to the scene.activeCameras list, it’s not possible to interact with the axis handle (which is the purpose of this HUD camera)

How can I solve this chicken egg problem? (I want to avoid using 2D GUI, because of blurriness in retina displays)