Jacques constructs his images by intervening either in the actual capturing process (incamera) or in post-production, using various techniques, such as drawing, painting or digital tools.

In the 1990s, Jacques Pugin becomes interested in the still images as they are taken from a video source, giving rise to a series of photographs entitled Blue Mountain and a book of the same name, with text by Jean-Michel Olivier, published by Idees et Calendes.

In the 2000s, he travels worldwide – especially to African deserts, India and Latin America- for a large work entitled Sacred Sites (2002–present), supported by a grant of the Leenaards Foundation.

In 2013 he finishes the series The knights of the devil, a photographic work with geopolitical scope started in 2008, about the signs left by the remnants of the civil war in Darfur.

Investigating colour with the technique of light painting, the photographer uses elements floating on water or wind to symbolize the passage of time.

Unlike Land Art artists, who work in a particular place using found materials, that they then typically capture, his approach is to shoot raw landscapes.

This time, the traces are the vestiges of the civil war in Darfur: abuse performed by the Janjawids, (the knights of the devil) who raped the women, killed the children, slaughtered the population, before burning the villages, leaving nothing but the ashes of homes and fences.

Jacques Pugin has chosen to apply to his images a double treatment : firstly, by draining all color, turning them into black and white, and secondly, by inverting them, pointing to the symbolic and fundamentally dark, negative nature of the barbarity that they witness.

If this work can be seen to belong to the Pugin's continued researched on traces started in 1979, with the Grafted graffiti series, this time his drive is primarily a political one.

Conscious of journalists' lack of access into the Darfur region, the artist questions the role of the internet by indirectly transforming Google Earth into a reporting tool that witnesses from high above.