In his first solo museum exhibition, Chuck Sperry offers an array of his pop-infused, post-modernist works. “All Access: Exploring Humanism in the Art of Chuck Sperry” opens on Sept. 14 at the Fort Wayne Museum of Art. Running alongside this exhibition is “Litmus Test: Works on Paper from the Psychedelic Era,” a survey of Wes Wilson, Victor Moscoso, and others, with blotter sheets from Sperry, Mark Mothersbaugh, H.R. Giger, and more.