I want to propose you some addition to assetManager and sceneOptimizer.
If the solution already exist, said me
1. Get loading percent, not on x file loaded but on stream data loaded when it's possible.
> for more precision and to show state if you load some big files.
2. Add "abort" function and "onAbort" callback to cancel running tasks and loading files.
> Currently "clean" function delete tasks in assetMana