Viewing contemporary art, one too often arrives on the scene with a sense that Mardi Gras is over and Ash Wednesday’s upon us. The fun is at an end, and from here on in, it’s all clean-up and de-brief. Dutifully, joylessly, one’s eyes defer to the wall labels. When I look at Charline von Heyl’s paintings, on show at the Institute of Contemporary Art in Boston, I feel caught up in the midst of something that’s yet to end. Is it a celebration? A séance? A secret experiment? I can’t say. All I can say is that I am in a place where the dust is yet to settle.