I'm going to take a guess and say that it's not CGI at all, just tracked very precisely and cropped. Since the rolling die will always have a shape of a circle, you need to track just the circle. Also you can see the background change somewhat as it travels across the surface (this could be of course simulated too). In theory, you would place a top-down camera above a desk, record the entire desk, roll the die, then track it and crop it.
snac.lab8.cz is astounded to be able to announce that its #snac instance just achieved an important milestone in the history of the Czech internet!
As of now, it is the biggest and most premier#snac2 instance in the entirety of the Czech republic! (And possibly somewhere in the top 5 in Europe).
Thank you to all the members of our instance, who bled tears and cried phlegm to get us to where we are today, thank you to snac's author: @grunfink@comam.es , who's project remains a continuous source of hope and inspiration, but most importantly - thank you, the boosters, the favoriters, the bookmarkers, the reply-guys, the friends and foes, the consumers of content, for making the fediverse the place to be!