One of the many concept drawing of Radagast the Brown,
and one of the many concept drawings of Paul Tobin. One of Weta Workshop's concept artists, Paul Tobin has recently posted samples of his amazing artwork on his blog. The detail is stunning, and one could spend hours staring at the colorful portraits, pencil sketches, and diagrams of the various weapons. It is well worth a look!
Source: The Art and Design of Paul Tobin