What's this about?
A year ago Ethan Mollick posted a fake AI-video mockup of a "Van Gogh city builder" game. This year he had Fable actually build it — and the model invented the core mechanic itself: you paint the landscape in big brushstrokes, and the environment evolves with weather and seasons.
What exactly is notable about "the AI invented the mechanic"?
It didn't just implement a spec — it made a design decision, choosing how the game should *play*, not only how it should look. That's a step from "code what I described" toward "propose what would be good," the harder and more interesting capability.
Why does it matter?
113 likes. Paired with the Blender/Unity otter game earlier this week, it's a recurring demonstration that models now handle open-ended creative build tasks — including the judgment calls — end to end.