Andrew Dadson pushes what’s normally in the center of a painting to the edges, and your attention with it. He paints layer after layer of oil paint across a canvas, scraping each layer to an upper or side edge, where the colors pile up into billowy confectionary piles. He then coats the main part of the surface in either black or white: flat monochromes encroached upon by borders of scrumptious chaos. There’s an interior and an exterior to what you see; it’s like the “blind field” that theorist Roland Barthes writes about in photography, the field of the world of the photograph outside the frame, always waiting. (Henry Art Gallery, 4100 15th Ave NE,, 11 am–4 pm, $10 suggested)