FaceBuilder is a Nuke node for building 3D models of human’s face or head based on just a few photos. With FaceBuilder creating a head model is as simple as working with PinTool. Get a few photos with neutral face from different angles and place a model on each of them to build a head or face model. The resulting model can be used, for example, for rigid tracking with GeoTracker or for facial gestures tracking with FaceTracker.
FaceBuilder provides a set of checks to disable some parts of a model. It can be handy when you exporting a part of a head, not a full model.
FaceBuilder is built on top of PinTool and includes all its strengths such as simple and powerful model positioning tool, advanced model drawing, a lot of exporting options, focal length estimation, etc.
Using all the pins from all the key frames FaceBuilder recalculates the resulting model's shape and model's positions in each key frame.
Yes, you can build a model using a video instead of a sequence of photos. Basically there is no difference between the two ways.
No. Currently all the photos should have the same resolution.