His media often include twigs, thorns, muds, snow, icicles, brightly colored flowers and leaves. For tools he uses only his bare hands and found tools.
His work process is obsessive and opportunistic. He is preoccupied with the inevitable destruction of his sculptures by elemental forces. He seems to prefer works that exist only extremely briefly or whose continued coherence is highly uncertain. Many of his pieces collapse during construction and he often rebuilds them several times before he is able to photograph them in completion.
The documentary movie Rivers and Tides show him working and some of the pieces he has created.