Voici un addon qui semble parfait pour la tâche, bon et gratuit.
Pour avoir mieux, c’est soit payant soit Z-Brush, donc bof.

#include <GameplayDebugger.h>
#include <GameplayDebuggerPlayerManager.h>

void AMyPlayerController::BeginPlay()
{
	Super::BeginPlay();

	#if WITH_GAMEPLAY_DEBUGGER
	GetWorld()->GetTimerManager().SetTimerForNextTick(this, &AMyPlayerController::DisableGameplayDebugger);
#endif
}

void AMyPlayerController::DisableGameplayDebugger()
{
// This needs to wait until after AGameplayDebuggerPlayerManager has finished setting up, which can take multiple frames on clients.
#if WITH_GAMEPLAY_DEBUGGER
	UC0GameInstance* GI = UC0Statics::GetGameInstance();
	// Disabled in the main menu, and for clients.
	if (IGameplayDebugger::IsAvailable())
	{		
		AGameplayDebuggerPlayerManager& Manager = AGameplayDebuggerPlayerManager::GetCurrent(GetWorld());
		if (UInputComponent* ManagerInput = Manager.GetInputComponent(*this))
		{
			PopInputComponent(ManagerInput);
		}
		else
		{
			// Try again next tick until ready
			GetWorld()->GetTimerManager().SetTimerForNextTick(this, &AMyPlayerController::DisableGameplayDebugger);
		}
	}
#endif
}

Gameplay tags, à surveiller, encore un truc cryptique non documenté à retenir.

Faudra essayer ça.
Dream Machine.