I made an animation and when exporting to FBX the animation started shaking, but in blender i have no problem.
Problem FBX in Marmoset Toolbag: https://drive.google.com/file/d/1loDWkOefH95C00tcl_WS7Egwn-8rOaMG/view?usp=sharing
Noproblem Blender render: https://drive.google.com/file/d/1Xj08Ifq4eT7UK76tmDlC5UUnCGDALV2z/view?usp=sharing
Actually in FBX the rendering of the pose is wrong because i reset the rest pose, but the shaking is still here. I can remove a big body shaking from the entire model if I remove parental controls from this orange selected bone that is "keep offset" to the "root" bone. But legs and arms shaking still here, i think problem in inverse kinematics, but i don`t know how fix that. I need your help, blender community.
A similar problem: Blender animation not exporting correctly to FBX