Simon Goellner (@simeydotme)’s collection of Holographic Trading Cards have captured our attention.
Under the hood there is a suite of filter(), background-blend-mode(), mix-blend-mode(), and clip-path() combinations that have been painstakingly tweaked to reach the desired effect. I ended up using a little img { visibility: hidden; } in DevTools to get a better sense of each type of holographic effect.
Josh Dance (@JoshDance) replied with a breakdown of the effects that lets you manually control the inputs.
