UV Ray Column

Newton's method applied to f(z) = z^16 + 1. Rotating the roots by half a sector puts a basin boundary exactly on the positive imaginary axis, which is invariant under the map, and the portrait window sits on that line. Colour is a strict single-hue duotone held at sRGB hue 247 to 252 degrees, so basin identity is not encoded and the smoothed Newton count carries the whole image.