At the moment for SDK 3 avatars, there is no proper way to disable Fullbody IK like with SDK 2 avatars. We have legacy locomotion for SDK 3 worlds that relied on the behavior, so it would be nice to also have this behavior in SDK 3 as a couple of my avatars rely on Disabled Fullbody IK for obvious reasons, which has prevented me from moving over older avatars to SDK 3.0 and noticing that SDK 2.0 content will get locked out at some point without a replacement. Example Below of the bone structure in blender and in game.