diff --git a/Source/CAVEOverlay/Private/CAVEOverlayController.cpp b/Source/CAVEOverlay/Private/CAVEOverlayController.cpp
index 71f96753f4c37f6d905418018076f863687921b3..6e2b756f70c07128b52cc46dae52c216da0ebb32 100644
--- a/Source/CAVEOverlay/Private/CAVEOverlayController.cpp
+++ b/Source/CAVEOverlay/Private/CAVEOverlayController.cpp
@@ -154,7 +154,7 @@ void ACAVEOverlayController::SetDoorMode(EDoor_Mode M)
 		Door_Current_Opening_Width_Absolute = Wall_Distance * 2;
 		if (Screen_Type == SCREEN_DOOR) Overlay->BlackBox->SetRenderScale(FVector2D(1, 1));
 		if (Screen_Type == SCREEN_DOOR_PARTIAL) Overlay->BlackBox->SetRenderScale(FVector2D(1, 1));
-		if (Screen_Type == SCREEN_MASTER) Overlay->BlackBox->SetRenderScale(FVector2D(1, 1));
+		if (Screen_Type == SCREEN_MASTER) Overlay->BlackBox->SetRenderScale(FVector2D(0, 1));
 		Overlay->BlackBox->SetVisibility(ESlateVisibility::Visible);
 		break;
 	case EDoor_Mode::DOOR_CLOSED: