1. A method for automatically generating a facial avatar resembling a user in a defined art style comprising: capturing three dimensional (3D) image data of user head features including facial features by a 3D capture device; generating a user 3D head model for the user based on the captured 3D image data by one or more processors communicatively coupled to the 3D capture device; identifying a set of transferable user head features from the user 3D head model which can be represented in the facial avatar based on transferable head feature rules for the defined art style; identifying a set of avatar character head features to represent the set of transferable user head features based on the transferable head feature rules for the defined art style, the transferable head feature rules directing which of the facial features are transferable to the facial avatar for the defined art style; iteratively performing a morph target animation technique operating on shape units of a human head reference mesh model until a matching criteria with a 3D tracking mesh is satisfied, storing a set of measurements relating the head features and the 3D tracking mesh as a user 3D head model, including storing as coefficient data of the user 3D head model 3D the coefficients data for each point in each respective shape unit which satisfied the matching criteria; generating the facial avatar in the defined art style including the set of avatar character head features; and displaying the facial avatar by a display communicatively coupled to the one or more processors.