Set up

When sitting for an on line capture session using Rigvadar, it is best to use a circle light as used by social media influencers....lighting should be even but somewhat contrasty.

Excessive head movements can lead to problems in transferring to a control rig, and add to the work load of editing facial data, so keep head movements restricted unless the actor is equipped with a head mounted camera.

The highest fidelity results are obtained whilst head is stationary, but this is sometimes impractical.

Head movements, micro eyebrow movements etc are all essential to the expression of emotion just as much as lip movement so they should not be discouraged. Even small head movements add to the expressivness of the performance, especially close ups, and the system can easily accomodate these.

There is usually no need for expansive head jerks.

Check out the Andy Serkis example , where subtle head movements and constrained head shakes can make all the difference to the final result.

If you need to capture large head movements, a conventional head mounted camera is recommended.

Alternatively, it is possible to create two takes - one for capturing facial performace, and another just for large head movements.

The FBX file for the later can be easily used to rotate a head rig independently of the FBX used to modulate expressions.

However for most purposes the system is markless and allows for small to moderate head movements.

For extra point tracking, the subject can have small stickers placed on the face.

I suggest using a small 'star' sticker with a pin pushed through it to create a small hole. This provides the necessary contrast for accurate tracking to occur.

A high speed camera set at 60 fps will capture rapid movements. The online app can parse these motions very well.