We’ll probably be talking about No Man’s Sky a lot around here, but since it’s not out yet details are a bit scarce. The video above is one of the lengthier interviews I’ve seen that goes into how their system works.
Here’s an article about Grant Duncan’s recent GDC presentation about the game’s procedural generation. He mentions that the testing process involves drone-captured GIFs, and talks about how they use a tagging system to get more interesting relationships between the procedural systems.