VR Spectator

gistfile1.txt

	// Add in a BP function library:
  
  /**
	 * Create a transient render target. This version exposes bForceLinearGamma.
	 */
	UFUNCTION(BlueprintCallable, Category = "Liv", meta = (WorldContext = "WorldContextObject"))
		static UTextureRenderTarget2D* CreateRenderTarget2D(
			UObject* WorldContextObject,
			int32 Width,
			int32 Height,
			bool bForceLinearGamma = true,
			FName Name = NAME_None,
			ETextureRenderTargetFormat Format = ETextureRenderTargetFormat::RTF_RGBA8,
			FLinearColor ClearColor = FLinearColor::Black,
			float TargetGamma = 0.0f);

// ...

UTextureRenderTarget2D* ULivBlueprintFunctionLibrary::CreateRenderTarget2D(
	UObject* WorldContextObject, 
	int32 Width, 
	int32 Height,
	bool bForceLinearGamma, 
	FName Name, 
	ETextureRenderTargetFormat Format, 
	FLinearColor ClearColor, 
	float TargetGamma)
{
	UWorld* World = GEngine->GetWorldFromContextObject(WorldContextObject, EGetWorldErrorMode::LogAndReturnNull);

	if (Width > 0 && Height > 0 && World)
	{
		UTextureRenderTarget2D* NewRenderTarget2D = NewObject<UTextureRenderTarget2D>(GetTransientPackage(), Name);
		check(NewRenderTarget2D);
		NewRenderTarget2D->RenderTargetFormat = Format;
		NewRenderTarget2D->ClearColor = ClearColor;
		NewRenderTarget2D->bAutoGenerateMips = false;
		NewRenderTarget2D->TargetGamma = TargetGamma;
		NewRenderTarget2D->bForceLinearGamma = bForceLinearGamma;
		NewRenderTarget2D->InitAutoFormat(Width, Height);
		NewRenderTarget2D->UpdateResourceImmediate(true);

		return NewRenderTarget2D;
	}

	return nullptr;
}

// Call with bForceLinearGamma = false (RTF_RGBA8 format worked well for me)