Skeletal Animation No initial bone rotation I am currently trying to implement animations in my game. I am having an issue where the bones do not rotate properly. In my program, I apply an inverse bind pose to each bone to move them to bone space. Then I recursively calculate the transformations for each bone for the keyframe. The bone transformation looks like this bone.Transform InverseRootGlobal Global bone.InversePose InverseRootGlobal is the inverted root node transformation Global is the recursively calculated transformation bone.InversePose is the inverse pose matrix It appears that all is correct apart from the bones initial rotation. When I move the bones to bone space, they loose their rotation from the bind pose and 'point up'. Here's what it looks like If it helps, I am using Assimp to import the data. Thanks in advance.