[1][2] Inspired by the methodology of J. M. W. Turner,[3] and Foster's interest and passion for wildernesses and painting en plein air, he chose to focus on his own narrative observations, making art a full-time occupation at age 35.

[2] He blends 19th century British explorer traditions of making detailed notebook sketches of his travels while working in a large-scale contemporary format.

[6][7] Trekking on foot, rafting, canoeing or scuba diving are some of the methods Foster employs to explore the natural landscape.

[12][13] Foster resolves about two-thirds of each painting on-site, leaving graphite notes on the paper for reference, then completes the work in his Cornish studio.

The completed watercolour artworks include his diary entries, collected souvenirs, talismans, and maps, resulting in a visual and written record of Foster's encounters on his wilderness journeys.