What’s the connection between this and high end game engines (like unreal 5). I would expect 3d game engines to be used at least for training data and fine tuning. But perhaps also directly in the generation of the resulting videos?
For example this looks very much like something from a modern 3d engine:
They almost certainly trained on video game output and this is clearly bleeding into the style of some of these demos.
The SUV video for example looks very much like something you'd see in a modern video game which probably makes sense because most videos with kind of perspective are going to be from video games.
I don't know how they would use game engines directly for training and fine tuning though. It would be far too labour intensive to render high quality scenes using a video game engine for every prompt.
For example this looks very much like something from a modern 3d engine:
https://twitter.com/OpenAI/status/1758192957386342435