There’s been a lot happening at the Menil Collection’s art campus in Houston. The newly renovated main building, designed by Renzo Piano in 1986, which reopened to the public in September, displays recently acquired work by contemporary artist Leslie Hewitt. Her white powder-coated sheet metal sculptures, folded and bent at different angles, are particularly arresting in this setting. Just a few yards away is another new addition to the campus that bears a striking resemblance to those minimalist forms, the Menil Drawing Institute.