The following produces one red square and two black ones, as opposed to one red and two randomly perturbed but also red ones I was hoping for. To my poor understanding this usage seems to comply with that defined in mp-tool.mp. What am I doing wrong. Regards, Johan \setupcolors[state=start] \definecolor[tilered][r=.425, g=0, b=0] \definecolor[smudge][r=.1, g=.1, b=.1] \defineoverlay[page][\useMPgraphic{page}] \setupbackgrounds[page][background=page] \startuseMPgraphic{page} fill unitsquare scaled 2cm withcolor \MPcolor{tilered} ; fill unitsquare scaled 2cm shifted (2cm,0cm) withcolor \MPcolor{tilered} randomized .1 ; fill unitsquare scaled 2cm shifted (4cm,0cm) withcolor \MPcolor{tilered} randomized \MPcolor{smudge} ; \stopuseMPgraphic \starttext test \stoptext -- Johan Sandblom N8, MRC, Karolinska sjh t +46851776108 17176 Stockholm m +46735521477 Sweden "What is wanted is not the will to believe, but the will to find out, which is the exact opposite" - Bertrand Russell