added dialog start radius and background by time in cutscenes

src/dialogue/DialogueRuntime.cpp

@@ -325,6 +325,7 @@ void DialogueRuntime::startCutscene(const std::string& cutsceneId, const std::st
 
 	activeCutscene = cutscene;
 	pendingNodeAfterCutscene = nextNodeAfterCutscene;
+	currentCutsceneBackground = cutscene->background;
 	mode = Mode::PlayingCutscene;
 	currentCutsceneLine = -1;
 	cutsceneTimerMs = 0;
@@ -363,12 +364,18 @@ void DialogueRuntime::refreshCutscenePresentation() {
 	}
 
 	const CutsceneLine& line = activeCutscene->lines[currentCutsceneLine];
+
+	 if (!line.background.empty()) {
+        currentCutsceneBackground = line.background;
+    }
+
 	presentation.mode = PresentationMode::Cutscene;
 	presentation.speaker = line.speaker;
 	presentation.fullText = line.text;
 	presentation.visibleText = line.text;
 	presentation.portraitPath = line.portrait;
-	presentation.backgroundPath = activeCutscene->background;
+	//presentation.backgroundPath = activeCutscene->background;
+	presentation.backgroundPath = currentCutsceneBackground;
 	presentation.choices.clear();
 	presentation.selectedChoice = 0;
 	presentation.revealCompleted = true;