In Deus Ex: Mankind Divided the player can find 35 triangle pieces as loot scattered throughout the world. By viewing them in my inventory and scanning them (like a QR code) into the Deus Ex Universe mobile app, I can view/listen to behind-the-scenes interviews and artwork, similar to what was available in the Director's Cut of Deus Ex: Human Revolution.
The Eidos developers often tout their intention and ability to make Deus Ex games flow properly even for players who do things out of order (whether accidentally or on purpose). Has Square Enix done the same with these triangles, or will any of them spoil the plot if I pick them up and view them before I'm "supposed" to?