The photograph is the most perfect picture. It does not change; it is absolute, and therefore autonomous, unconditional, devoid of style. Both in its way of informing, and in what it informs of, it is my source.

But my motivation was more a matter of wanting to create order - to keep track of things. All those boxes full of photographs and sketches weigh you down, because they have something unfinished, incomplete, about them. So it's better to present the usable material in an orderly fashion and throw the other stuff away. That's how the Atlas came to be, and I exhibited it a few times.

I go to the studio every day, but I dont paint every day. I love playing with my architectural models. I love making plans. I could spend my life arranging things.

The first colour charts were unsystematic. They were based directly on commercial colour samples. They were still related to Pop Art. In the canvases that followed, the colours were chosen arbitrarily and drawn by chance. Then, 180 tones were mixed according to a given system and drawn by chance to make four variations of 180 tones. But after that the number 180 seemed too arbitrary to me, so I developed a system based on a number of rigorously defined tones and proportions.

A work of art is itself an object, first of all, and so manipulation is unavoidable: it's a prerequisite. But I needed the greater objectivity of the photograph in order to correct my own way of seeing: for instance, if I draw an object from nature, I start to stylize and to change it in accordance with my personal vision and my training. But if I paint from a photograph, I can forget all the criteria that I get from these sources. I can paint against my will, as it were. And that, to me, felt like an enrichment.

If the abstract paintings show my reality, then the landscapes and still-lifes show my yearning.

I don't mistrust reality, of which I know next to nothing. I mistrust the picture of reality conveyed to us by our senses, which is imperfect and circumscribed.