Choosing an appropriate value for the Default Virtual Vertex Distance is important. The default value of 3cm is generally suitable for ordinary characters but large objects or exotic characters might require fine tuning. UE also has support for special bones that require more accuracy. By default, every bone that has a socket attached will be deemed as needing high accuracy as well as any bone that contains one of the substrings present in UAnimationSettings::KeyEndEffectorsMatchNameArray. Common substrings included are: hand, eye, IK, camera, etc. For those special bones, the Safe Virtual Vertex Distance is used instead.