Tl;dr Procedural animations (like walk cycle from two poses).
I would be curious if it is possible to achieve out-of-box in Persona, or would I need to write some supporting code first.
Other than that I was really impressed about the multiple poses for different weapons, setup. I’m currently facing similar problem just multiplied by 2.
In my case I have different weapons, and on top of that dual wielding different weapons (where it make sense, although nothing wrong with Rambo style two M92 in each hand). I would be really interested in more detailed explanation about the setup used in Fortnite.
I’m also curious about those attachments setup, where attachment bones which Matthew mention, could be used to animate, well attachments without actually creating separate animation for each possible variation. It’s yet another problem I’m currently on, as my characters have lots of attachments (at least 6 weapon attachments, shoulders, random things like pouches). I’m currently trying to make all of them physicalized, which would not be bad solution, if I could get it working.
And besides that non physical solution might be just more efficient/fitted for some cases.