For me Floor van Keulen is similar with wall drawing. The projects i remember and encountered all were wall drawings by this artist. He mostly uses black . paint on a white back ground, but the drawing i witnessed come to life personally was the one he made in the projectenzaal of the Gemeentemuseum.
It was an extremely large one and had some bright colors in it. Franz Kaiser was the responsible curator and Gracia Lebbink designed a beautiful small publication for the project which is available at ww.ftn-books.com. It does not take long for van Keulen to execute such a large wall painting. Within the week it was there. But a projectroom functions only if the project is temporary, which means the painting was overpainted after the show was over. Still the book keeps the painting alive.