Any picture printed in two inks through a halftone dot or line screen; with no image, a city at night that lights up click by click.

Made as a Kadal Deck premium background, it fills whatever box you give it at its real size, in light and dark, and follows your brand colour (the --deck-accent CSS variable). Settings: image (the picture: a URL or a path in public/, same origin, or served with CORS. "skyline" prints the built-in city at night), ink (the shadow ink. "auto": the page in dark, a pale wash in light, text stays readable; "shadow": the darker of text and page), paper (the highlight ink, where the picture is lightest), screen (a 45° halftone dot screen, a horizontal line screen, or a smooth duotone with grain), dot (the screen's cell, in slide pixels: smaller is finer), grain (how uneven the print is: dot jitter on a screen, film grain without one), lit (skyline only: the share of windows lit, 0 to 1, or a list, 0.3, 0.6, 1 stepped by the slide's clicks, engine 0.8+) and focus (which part of a cropped picture stays in frame, as "x% y%").

What you get: a web component, one script with no framework, for a plain page, Webflow, WordPress or Framer, drawing behind your own content. A React component that also renders in Remotion. Stills at 2560 x 1440 in light and dark. A demo page to try the settings and print a PDF, and a README with a recipe for each.

In Kadal Deck, buying it unlocks Duotone Image in every workspace you belong to (as background pro/duotone-image). Pro, Team and Lifetime plans include every premium background already.