DragonIK Plugin
https://www.fab.com/listings/d3f8d256-d8d9-4d27-91c1-c61e55e984a6
Github example project
https://github.com/codehawk64/DragonIK-PhysicsSolverExample
Time code -
(0:00) Explanation
(0:14) Basic Preparation
(03:56) Actual setup starts here
Music by Karl Casey @ White Bat Audio
