BoneList and BoneFilterActionOption in LOD0 of LODSettings are filters by the following code.
void FSkeletalMeshLODSettingsDetails::CustomizeDetails(IDetailLayoutBuilder& LayoutBuilder)
{
...
static const TArray<FName> HiddenProperties = { GET_MEMBER_NAME_CHECKED(FSkeletalMeshLODGroupSettings, BoneFilterActionOption),
GET_MEMBER_NAME_CHECKED(FSkeletalMeshLODGroupSettings, BoneList) };
for (int32 HiddenPropIndex = 0; HiddenPropIndex < HiddenProperties.Num(); ++HiddenPropIndex)
{
TSharedPtr<IPropertyHandle> ChildHandle = LODChildHandle->GetChildHandle(HiddenProperties[HiddenPropIndex]);
LayoutBuilder.HideProperty(ChildHandle);
}
}
However, it doesn't consider what happens after the item is updated. So the following change will fix this issue.
void FSkeletalMeshLODSettingsDetails::CustomizeDetails(IDetailLayoutBuilder& LayoutBuilder)
{
...
// add
FSimpleDelegate OnSettingsHandleChanged = FSimpleDelegate::CreateSP(this, &FSkeletalMeshLODSettingsDetails::OnSettingsHandleChanged, &LayoutBuilder);
SettingsHandle->SetOnPropertyValueChanged(OnSettingsHandleChanged);
}
// add
void FSkeletalMeshLODSettingsDetails::OnSettingsHandleChanged(IDetailLayoutBuilder* DetailLayoutBuilder)
{
DetailLayoutBuilder->ForceRefreshDetails();
}
result : Bonelist of LODGroups/LOD0 exist
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-191530 in the post.
| 0 |
| Component | UE - Anim - Runtime |
|---|---|
| Affects Versions | 5.2 |
| Target Fix | 5.8 |
| Created | Jul 31, 2023 |
|---|---|
| Updated | Sep 29, 2025 |