If you are using IK in 3ds Max and experiencing problems the following post fixed it for me. http://area.autodesk.com/blogs/maxstation/k3-fixing-ik-solver-animation-editing-in-3ds-max-2017
Hey guys, If you haven't already seen the thread there is a new Riot Creative Contest that involves an animation category http://polycount.com/discussion/192491/announcing-the-riot-creative-contest-2017 Get involved! :)