In the early 20th century, Western artists began exploring abstract, nonrepresentational forms for the first time. Several decades later, abstraction's practitioners experimented with new materials and techniques: Dripping, pouring, staining, and even slinging paint became common, as did the use of non-traditional media such as acrylic and industrial paints. Artists also ditched the flat, rectangular format to create sculptural texture and dimensionality. Now, can you guess whose corporate collection is particularly strong in such paintings of the 1960s and '70s? If you guessed "The Blanton Museum of Art," then you'll especially want to get an eyeful of this major new show, subtitled "Pushing the Boundaries of Painting in the Americas," organized by the venue's own Carter E. Foster.