this invention underlies a set of 3 - dimensional art objects which may also find utility in the studies of vision science , geometry and physics . the apparent luminance of reflected colors is altered by the introduction of zero light intervals . in the first species , the intervals of darkness lie between colored regions in a static manner . in the second species , a time - period of darkness is caused by shadows . when viewed under incidental white light , the objects exhibit additive primaries by reflection to stimulate sensations of secondary colors — magenta , cyan , and yellow — and tertiary colors