PLANE0THE SCREEN PLANE · ZERO PARALLAX
Zero is where
the words live
Essay — Ines Okonkwo · 2,400 words
At zero disparity the red and cyan channels land on top of each other and the text simply goes white. There is no offset to resolve, no fusing to do, no shimmer at the edges of the letterforms. It is the only plane on this page where reading is effortless — and so it is the plane we gave to the argument itself.
Stereographers call this the window. Historically it was the physical frame of the viewer: a brass-bound Holmes stereoscope with two albumen prints mounted an inch apart, the card sliding along a rail until the two images snapped into one. Anything you wanted the audience to actually study went at the window. Spectacle went in front of it. Context went behind.
The web inherited none of this vocabulary. We have z-index, which is an ordering, not a distance — an integer that says above without ever saying how far above. This issue treats depth as a real quantity, and the layout you are scrolling is the argument for doing so: a document with a measurable front and a measurable back.
Return here whenever a plane becomes hard to read. The window is always at zero.