Groff notes: "To me great landscape painting is abstract painting that also has a structure and is intrinsically bound to certain visual restrictions. These restrictions paradoxically can make the process more freeing. I increasingly find that by narrowing the range of choices you free up your mind to push ideas further and to look at design possibilities more fully... Each painting has its own rules about how closely to follow observed facts. Sometimes the most interesting thing to me is the chance arrangement of forms found in the chaos of nature that is far more interesting visually than the order I might impose on it. The visual surprises from nature can be a catalyst for bigger abstract ideas that would have been difficult or impossible from invention alone. Other times nature is just a jumbled mess and you first need to wipe out everything in order to see where a painting might come out of all of it. On occasion, a more laborious (and often less successful) manner involves putting in everything that might be tried, then as the painting progresses, gradually removing the non-essential – which is somewhat like how I’ve lived my life for many years."