Exporting Blender bones' transform matrix I use this simple python script to export bones transformation bones armature.pose.bones for eaach bone in bones SystemMatrix Matrix.Scale( 1, 4, Vector((0, 0, 1))) Matrix.Rotation(radians( 90), 4, 'X') if (bone.parent) Export babylon.write matrix4(file handler, "matrix", bone.parent.matrix.inverted() bone.matrix) else Export babylon.write matrix4(file handler, "matrix", SystemMatrix bone.matrix) I'm using a left handed Y up system but I should forget something about rotation because the result is not correct ( Original (under Blender)