>>375508329
>>375529169
Leap can definitely handle finger splay. The API that's been used for osc finger tracking has details for individual finger bone positions and it's already been done in Neos.
https://developer-archive.leapmotion.com/documentation/javascript/api/Leap.Finger.html
https://www.youtube.com/watch?v=oEG2-Yc-0Wc
The implementation I'd seen for VRChat just looks like it's using finger bone positions relative to the hand as an input to control animations though.
https://github.com/adeleine1412/leapmotion-osc