 An interview with Robert Clotworthy, the voice of Jim Raynor in all released "StarCraft" games to date, has revealed that for the most part the voicing for the characters was done over only a few days in sessions of up to four hours, a fact mirrored in a similar interview with Sarah Kerrigan's actress, Glynnis Talken Campbell.Clotworthy also stated how the concept art for the game usually used for the visual development of characters and locales in games was used by him in order to develop the personality of his character.Visually, most of the characters and units in the games were developed from artwork by Metzen and Samwise Didier, although at least two other artists—Glenn Rane and Peter Lee—have developed concept art for "".