postprocessingInCapture.cpp

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

	UE_LOG(LogTemp, Warning, TEXT("AMyGameModeBase::BeginPlay()"));

	UGameViewportClient* GameViewportClient = GEngine->GameViewport;
	FViewport* Viewport = GameViewportClient->Viewport;

	ULocalPlayer* LocalPlayer = GEngine->GetDebugLocalPlayer();
	APlayerController* PlayerController = GetWorld()->GetFirstPlayerController();

	// create the view family for rendering the world scene to the viewport's render target
	FSceneViewFamilyContext ViewFamily(FSceneViewFamily::ConstructionValues(
		Viewport,
		GetWorld()->Scene,
		LocalPlayer->ViewportClient->EngineShowFlags)
		.SetRealtimeUpdate(true));

	// Calculate the player's view information.
	FVector		ViewLocation;
	FRotator	ViewRotation;

	FSceneView* View = LocalPlayer->CalcSceneView(&ViewFamily, ViewLocation, ViewRotation, Viewport, nullptr, EStereoscopicPass::eSSP_FULL);

	View->FinalPostProcessSettings;
	float PostProcessBlendWeight = PlayerController->PlayerCameraManager->CameraCache.POV.PostProcessBlendWeight;

	UE_LOG(LogTemp, Warning, TEXT("AutoExposureBias %f"), View->FinalPostProcessSettings.AutoExposureBias);
	UE_LOG(LogTemp, Warning, TEXT("PostProcessBlendWeight %f"), PostProcessBlendWeight);

	UE_LOG(LogTemp, Warning, TEXT(">>SceneCaptureComponent2D PostProcessBlendWeight %f"), SceneCaptureComponent2D->PostProcessBlendWeight);

	SceneCaptureComponent2D->PostProcessSettings = View->FinalPostProcessSettings;
	SceneCaptureComponent2D->PostProcessBlendWeight = 1.f;

}