sides of the nose corresponding with the mark made previously. The alae are then blended to the nose and the overall structure of the nose is rounded out and shaped appropriately. The muscles of facial expression and the soft tissue around the eyes are added next. Additional measurements are made according to race (especially for those with eye folds characteristic of Asian descent) during this stage. Next, tissues are built up to within one millimeter of the tissue thickness markers and the ears (noted as being extremely complicated to reproduce) are added. Finally, the face is "fleshed," meaning clay is added until the tissue thickness markers are covered, and any specific characterization is added (for example, hair, wrinkles in the skin, noted racial traits, glasses, etc.). The skull of Mozart was the basis of his facial reconstruction from anthropological data. The bust was unveiled at the "Salon du Son", Paris, in 1991. Problems with facial reconstruction There are multiple outstanding problems associated with forensic facial reconstruction. Insufficient tissue thickness data The most pressing issue relates to the data used to average facial tissue thickness. The data available to forensic artists are still very limited in ranges of ages, sexes, and body builds. This disparity greatly affects the accuracy of reconstructions. Until this data is expanded, the likelihood of producing the most accurate reconstruction possible is largely limited. Lack of methodological standardization A second problem is the lack of a methodological standardization in approximating facial features. A single, official method for reconstructing the face has yet to be recognized. This also presents major setback in facial approximation because facial features like the eyes and nose and individuating characteristics like hairstyle – the features most likely to be recalled by witnesses – lack a standard way of being reconstructed. Recent research on computer-assisted methods, which take advantage of digital image processing, pattern recognition, promises to overcome current limitations in facial reconstruction and linkage. Subjectivity Reconstructions only reveal the type of face a person may have exhibited because of artistic subjectivity. Soft tissue reconstruction is an approximation based on osteological measurements; therefore, distinguishing characteristics used in identification could be missed. The position and general shape of the main facial features are mostly accurate because they are greatly determined by the skull. Neolithic dog's head forensic reconstruction An image of the forensic model of a Neolithic dog skull found at Cuween Hill Chambered Cairn,