What you are looking at
The same page as the demonstration, without reveal-mosaic-hero.js. The
canvas is present but empty, so the photograph appears as it is. The black text would
cross the dark greens : .reveal-mosaic-hero__repli therefore lays a
gradient veil in the corner holding the title, which disappears as soon as the script
takes over.
The brush indicator is hidden as long as the data-ph-pret attribute is
not set : without a script it would have nothing to
indicate.