Something which would be useful to improve user experience when employing procedurally generated assets is to be able to generate them ahead of time during the loading screen, preventing visible slowdown or freeze during game startup.

The best method I've come up with so far for this is to add a new data type to the asset loader, :function, which accepts a function which takes a callback, executes that function, and then the callback responds as if on-done event. Proposal here is vague, because this is about all I've got so far on this idea.