You need to refresh to start the tracking

You can use the Tracking panel to see the list of parameters that the puppet was rigged with. By default, for each parameter you will see a widget that will let you select either a specific parameter from the currently connected tracking sources. You can either pick a specific parameter of one of the bones or the name of a blendshape to asociate the parameter to it.

Be aware that the software won't try to detect which bones or blendshapes are available from connected tracking sources until you press the “Refresh” button in the Tracking panel. Also, there are many things that can get configured for a specific parameter.

You can set which blendshapes data will feed the parameter you have on your model.

Before refresh button:


After refresh button, shows blendshapes. Now you can assign to your parameter.


When rigged, puppet parameters are usually set up so that they deform the puppet by a specific amount, usually between -1 and 1, or 0 and 1, but this doesn't always align with the input bone or blendshape data values. Bone position values and blendshapes usually can come in values between -inf and inf, but some of them only move between 0 and 1, while bone rotation values usually come in angle degrees (-180 and 180).

To make the tracking data match with parameter values, the Tracking In and Tracking Out intervals are used. For the context of a specific parameter, the tracking data will be clamped to the Tracking In range, and it will be transformed to the values of the Tracking Out range, which are the ones used by the puppet parameter. You can see how these behave by looking at the yellow bars. You can also press the Inverse checkbox to flip the input data.

If you want to learn about Blendshapes and Bones, you can read more in the concept section

• Pitch, Roll, Yaw