By the early 1860s von Guerard was recognised as the foremost landscape artist in the colonies, touring Southeast Australia and New Zealand in pursuit of the sublime and the picturesque. He is most known for the wilderness paintings produced during this time, which are remarkable for their shadowy lighting and fastidious detail. Indeed, his view of Tower Hill in south-western Victoria was used as a botanical template over a century later when the land, which had been laid waste and polluted by agriculture, was systematically reclaimed, forested with native flora and made a state park. The scientific accuracy of such work has led to a reassessment of von Guerard's approach to wilderness painting, and some historians believe it likely that the landscapist was strongly influenced by the environmental theories of the leading scientist Alexander von Humboldt. Others attribute his 'truthful representation' of nature to the criterion for figure and landscape painting set by the Düsseldorf Academy.