Other way of looking at the question is if you could make focus stacking better by using the full multi-view dataset? Afaik focus stacking essentially does depth estimation so it seems like multiple views would help with that.

Another way would be some kind of 4d GS where one dimension is the focus distance. But I'd guess the renders would inherently have shallow depth then, which is less useful usually.

> Another way would be some kind of 4d GS where one dimension is the focus distance.

That seems like the way to do it, someone has to be working on that.

searching...

https://dof-gaussian.github.io/