WATERVILLE — Russell Danner, a Waterville veterinarian, is seeking a patent on a mixture of spearmint and wintergreen oils that he says will knock a fish out cold.

Through his generosity, Alex Katz has arguably made himself into Maine’s most important living artist. He has donated his own paintings, and has actively collected contemporary artists for Maine institutions.

Amid paintings of traditional Maine themes — lobsters, lupines, lighthouses — there were a few artists that strayed from the norm. At the same time, actors roamed the sidewalks dressed as artists Salvador Dali and Louise Nevilson, and children’s book character Waldo.

Organizer Dusty Dowse estimated more than 3,000 people arrived Saturday at the Skowhegan State Fairgrounds for live music and about 40 vendors selling organic produce, handmade products and, of course, bread.