Whether this refers to objectives, material, or something else, is not known but critics have drawn particular attention to the way Rembrandt seamlessly melded the earthly and spiritual. Earlier 20th century connoisseurs claimed Rembrandt had produced well over 600 paintings, nearly 400 etchings and 2,000 drawings. More recent scholarship, from the 1960s to the present day (led by the Rembrandt Research Project), often controversially, has winnowed his oeuvre to nearer 300 paintings. His prints, traditionally all called etchings, although many are produced in whole or part by engraving and sometimes drypoint, have a much more stable total of slightly under 300. It is likely Rembrandt made many more drawings in his lifetime than 2,000 but those extant are more rare than presumed. Two experts claim that the number of drawings whose autograph status can be regarded as effectively "certain" is no higher than about 75, although this is disputed. The list was to be unveiled at a scholarly meeting in February 2010. At one time, approximately 90 paintings were counted as Rembrandt self-portraits but it is now known that he had his students copy his own self-portraits as part of their training. Modern scholarship has reduced the autograph count to over forty paintings, as well as a few drawings and thirty-one etchings, which include many of the most remarkable images of the group. Some show him posing in quasi-historical fancy dress, or pulling faces at himself. His oil paintings trace the progress from an uncertain young man, through the dapper and very successful portrait-painter of the 1630s, to the troubled but massively powerful portraits of his old age. Together they give a remarkably clear picture of the man, his appearance and his psychological make-up, as revealed by his richly weathered face. In his portraits and self-portraits, he angles the sitter's face in such a way that the ridge of the nose nearly always forms the line of demarcation between brightly illuminated and shadowy areas. A Rembrandt face is a face partially eclipsed; and the nose, bright and obvious, thrusting into the riddle of halftones, serves to focus the viewer's attention upon, and to dramatize, the division between a flood of light—an overwhelming clarity—and a brooding duskiness. In a number of biblical works, including The Raising of the Cross, Joseph Telling His Dreams, and The Stoning of Saint Stephen, Rembrandt painted himself as a character in the crowd. Durham suggests that