The paintings got sculptural because the forms got more complicated. I've learned to weave in and out. - Frank Stella

But we're still left with structural or compositional elements. The problems aren't any different. I still have to compose a picture, and if you make an object [as Donald Judd does] you have to organize the structure. I don't think our work that radical in any sense because you don't find any really new compositional or structural element. I don't know if that exists. It's like the idea of the color you haven't seen before. Does something exist that's as radical as a diagonal that's not a diagonal? Or a straight line or a compositional element that you can't describe?

When Morris Louis|Morris Louis showed in 1958, everybody [like in Art News, by Tom Hess ] dismissed his work as thin, merely decorative. They still do. Louis is the really interesting case... In every sense his instincts were Abstract Expressionist, and he was terribly involved with all of that, but he felt he had to move, too.

Clement Greenberg talked about the ideas or possibilities of painting in his - I think -, 'After Abstract Expressionism' article, and he allows a blank canvas to be an idea for a painting. It might not be a good idea, but it's certainly valid. Yves Klein did the empty gallery. He sold 'air', and that was a conceptualized art, I guess.