message: Don't get cameras from editor viewports in PIE mode.
diff: @@ -1058,6 +1058,17 @@ ACesium3DTileset::GetEditorCameras() const {
  return {};
  }
  + UWorld* pWorld = this->GetWorld();
  + if (!IsValid(pWorld)) {
  + return {};
  + }
  +
  + // Do not include editor cameras when running in a game world (which includes
  + // Play-in-Editor)
  + if (pWorld->IsGameWorld()) {
  + return {};
  + }
  +
  const TArray<FEditorViewportClient*>& viewportClients =
  GEditor->GetAllViewportClients();
  