
Some examples of impossible geometry (poster at Tarquin)

Some examples of impossible geometry (poster at Tarquin)
« Le noir, une non-couleur ? Où avez-vous encore pris cela ? Le noir, mais c’est la reine des couleurs ! » — Renoir (1841-1919)
• “Black, a non-color? Where did you get that idea? Black, why, it’s the queen of colors!”

When you stare at the cross for at least 30 seconds, you see three illusions:
• A gap running around the circle of lilac discs;
• A green disc running around the circle of lilac discs in place of the gap; and
• The green disc running around on the grey background, with the lilac discs having disappeared in sequence. — Lilac Chaser, Wikipedia
Elsewhere Other-Accessible…
• Troxler’s fading at Wikipedia
“The fact is, that, of all God’s gifts to the sight of man, color is the holiest, the most divine, the most solemn.” — John Ruskin, The Stones of Venice, Vol. 2 (1853)
Chimerical colors (from Wikipedia)
(click for larger)

A handsome hamsa (image from The Fair Trade Store)

Abyss-illusion rug in blue and yellow (image from Temu)

Golden Light (1893) by John Atkinson Grimshaw (1836-93)