Hold the Screen from Game Code

Why hold

The map can finish loading before your game is ready — inventory hydrating, save data applying, procedural generation running. A hold is a vote: the screen stays up until every vote clears.

Blueprint: the process task

Call Create Loading Screen Process Task (CreateLoadingScreenProcessTask(WorldContext, Reason)) when your work starts — creating it holds the screen — and call Unregister on it when the work completes. The Reason string shows up in the debug output, so make it descriptive.

C++: the interface

Implement ICrimsonLoadingProcessInterface and answer the poll — the manager automatically asks the GameState, local PlayerControllers, and all their components every frame:

bool UInventoryHydrator::ShouldShowLoadingScreen(FString& OutReason)
{
    if (!bHydrated)
    {
        OutReason = TEXT("Hydrating inventory");
        return true;
    }
    return false;
}

Objects outside that auto-polled set register explicitly with RegisterLoadingProcessor / UnregisterLoadingProcessor.