@Bone-Studio Good point, most of them had it already but I added the links here for CloudRig and missing ones for Blender Purge and Shot Builder - Although most of the things currently live in the same Blender Studio Tools repository.

@David Hallows As long as you avoid using features that aren't incompatible with UE, such as bendy bones and bone skewing, I see no reason why not!

@derek henry I think the reason this hasn't happened yet is because our productions haven't really required it. A "generic" face rig would be less expressive than something built more intricately by hand, and the latter has been the case for all of Sprite Fright, Snow, and now Project Heist. I would either need time dedicated specifically to this goal, or the next project would need to have a large cast of similar looking generic characters.

In the meantime, you can try taking Snow's metarig, but it is quite advanced so I can't really recommend it. I also don't think it would work on any other character without tweaking a LOT of things; Number and transforms of bones, driver expressions, poses, etc. This is why it's so tricky to come up with a "generic" solution that's still customizable enough to give a decent result. I'm sure it could be done, but it would take a lot of time and it's not on the roadmap right now.