It is important to get light and shadows right, but it is also important to keep your sense of proportions. Making all technical things correct do not make you an artist like Krid, Wusel, Schnuck, 00AngelicDevil00, bigbraader or anyone else of the many great artist here at Renderosity. In my estimation, it takes at least 3 or 4 fulltime manyears + talent to do that. Someone mentioned that both technical and artistic skills are needed to make an artist, true enough, but the artistic bit is one thousand times more work.