Hi trypnoiz,

When you use TrackedCam with Use Billboards option, the billboards themselves are the "composite planes". You do not have to add anything.
Please follow this doc:  https://aximmetry.com/wiki/index.php?title=Setting_Up_Virtual_Sets_with_Tracked_Cameras#Compositing_modes

If this does not answer your question could you elaborate on what do you want to achieve extactly?

Hi,

I'm terrible sorry, I misunderstood the original question. Now I get it.

Trypnoiz was looking at the right place, but used the wrong pin.

So step by step:

- Unlink the TrackedCam compound in order to access its internals:

- Switch to the control board and for the BILLBOARD select:

This will take you to the actual module inside the TrackedCam compund.

- What you have to control here is the Transformation pin which is hidden at the moment so open the module to its full extent:

- Use a Game Pose module to receive the tracker's position and control the Transformation with it:

Select the desired Device for Game Pose.

Please note that Game Pose is only usable if you use a Vive or an Antilatency tracker.
For non-game tracking systems like Stype Follower you have to use the Camera Tracking module,  but the principle is the same.

- Now you have two problems.
One is that the billboard "flies". We should not use the height (Y) position of the tracker, only X, Z.
The other is that the billboard rotates with the tracker. We do not want that, we only need its positional information.
To solve these split the transformation as follows:

That's it.
Note that you still have manual control over the Y position and the rotation of the billboard,  by manually setting the Vector Merge's Y  and the Transformation Compose's Rotation properties.
Alternatively you can use the Look At Camera option of the Billboard that takes care of the rotation automatically  (however in some cases it might have unwanted effects).

Please note that we'll add this functionality officially to the Billboard in the near future.