The magazine MAQ September 2018 MAQ Magazine November 2018 - Page 74

According to mixtures of colours, lighter, darker, other colours combined or used as background, not all colours react to the use of the glasses, not all colours are stereoscopic, and there are surprises. But enough of the sequence was understood well enough to set the twisted transparent Mobius strip floating in the air.

The cot itself demonstrates placement by progression or graduation of a stereoscopic colour as well as by draftmanship.