Sorry, I cannot include all the Hype assets in a free codepen, so I put it on my host.
Is a zip file enough for you to check this ?
Tell me if it isn't.
Thank you very much.
The zip that contains the HTML page and an assets folder.
http://www.swipe-et-swipe.fr/gsap/Archive.zip
This is the original Hype file :
http://www.swipe-et-swipe.fr/gsap/imbrication3D.hype.zip
A demo page at :
http://www.swipe-et-swipe.fr/gsap/imbrication3D.html
Here, only the first square seems to get the transformStyle property.
The GSAP code inside the document :
CSSPlugin.defaultTransformPerspective=900;
var wall = document.getElementById("wall");
var square1 = document.getElementById("p1");
var square2 = document.getElementById("p2");
var square3 = document.getElementById("p3");
var square4 = document.getElementById("p4");
var square5 = document.getElementById("p5");
var square6 = document.getElementById("p6");
// settings
TweenMax.set(wall,{rotationY:45, transformStyle:"preserve-3d"});
// tweens
TweenMax.to(wall,16,{rotationX:1440});
TweenMax.to([p1,p3,p5],4,{rotationY:720, z:200});
TweenMax.to([p2,p4,p6],4,{z:-200});