training a controlnet union

[hardik-uppal]

We are trying to train a new ControlNet union model for our own use cases. The work here has been extremely helpful. i had few question though

• Is there limit on the number of control that can be used?
• if we are training, with multiple controls, do we have to populate all the controls while training. For instance, if we training for pose and HED
  control, do we have to provide pose and HED control for each sample, or HED in some cases and pose for some.
• what are the recommened params for multi control setting?
  any help here would be greatly appreciated.