in museum boijmans van beuningen there was work on display by an italian.

he made this room, no windows, ventilationshafts or whatever. only 1 door to enter and exit. the room does not contain any corners. the point where the walls meet is made round.

next, he painted it white completely. this room is the most distorting possible. when you look in front of you you only see white. no reference point at all.

except for this painting on a sidewall, put in by the artist. luckily i had a mirror with me.