diff --git a/src/components/__tests__/GenerateImageNode.test.tsx b/src/components/__tests__/GenerateImageNode.test.tsx
index 40689faa..0c485162 100644
--- a/src/components/__tests__/GenerateImageNode.test.tsx
+++ b/src/components/__tests__/GenerateImageNode.test.tsx
@@ -362,6 +362,46 @@ describe("GenerateImageNode", () => {
       expect(screen.getByTitle("Next image")).toBeInTheDocument();
     });
 
+    it("should hide carousel controls when generations path is not configured", () => {
+      mockUseWorkflowStore.mockImplementation((selector) => {
+        const state = {
+          updateNodeData: mockUpdateNodeData,
+          regenerateNode: mockRegenerateNode,
+          addNode: mockAddNode,
+          incrementModalCount: mockIncrementModalCount,
+          decrementModalCount: mockDecrementModalCount,
+          providerSettings: defaultProviderSettings,
+          generationsPath: null,
+          isRunning: false,
+          currentNodeIds: [],
+          groups: {},
+          nodes: [],
+          recentModels: [],
+          trackModelUsage: vi.fn(),
+          getNodesWithComments: vi.fn(() => []),
+          markCommentViewed: vi.fn(),
+          setNavigationTarget: vi.fn(),
+        };
+        return selector(state);
+      });
+
+      render(
+        <TestWrapper>
+          <GenerateImageNode {...createNodeProps({
+            outputImage: "data:image/png;base64,abc123",
+            imageHistory: [
+              { id: "img1", timestamp: Date.now(), prompt: "test1", aspectRatio: "1:1", model: "nano-banana" },
+              { id: "img2", timestamp: Date.now(), prompt: "test2", aspectRatio: "1:1", model: "nano-banana" },
+            ],
+            selectedHistoryIndex: 0,
+          })} />
+        </TestWrapper>
+      );
+
+      expect(screen.queryByTitle("Previous image")).not.toBeInTheDocument();
+      expect(screen.queryByTitle("Next image")).not.toBeInTheDocument();
+    });
+
     it("should show current position in carousel", () => {
       render(
         <TestWrapper>
diff --git a/src/components/nodes/GenerateImageNode.tsx b/src/components/nodes/GenerateImageNode.tsx
index 08c4011e..e72c5c8b 100644
--- a/src/components/nodes/GenerateImageNode.tsx
+++ b/src/components/nodes/GenerateImageNode.tsx
@@ -335,7 +335,6 @@ export function GenerateImageNode({ id, data, selected }: NodeProps<NanoBananaNo
 
   const loadImageById = useCallback(async (imageId: string) => {
     if (!generationsPath) {
-      console.error("Generations path not configured");
       return null;
     }
 
@@ -445,7 +444,7 @@ export function GenerateImageNode({ id, data, selected }: NodeProps<NanoBananaNo
   const supportsResolution = currentModelId === "nano-banana-pro" || currentModelId === "nano-banana-2";
   const aspectRatios = currentModelId === "nano-banana-2" ? EXTENDED_ASPECT_RATIOS : BASE_ASPECT_RATIOS;
   const resolutions = currentModelId === "nano-banana-2" ? RESOLUTIONS_NB2 : RESOLUTIONS_PRO;
-  const hasCarouselImages = (nodeData.imageHistory || []).length > 1;
+  const hasCarouselImages = Boolean(generationsPath) && (nodeData.imageHistory || []).length > 1;
 
   // Count visible Gemini controls to match ModelParameters grid/max-width rules
   const geminiControlCount = 2 // Model + Aspect Ratio (always)
diff --git a/src/store/execution/__tests__/nanoBananaExecutor.test.ts b/src/store/execution/__tests__/nanoBananaExecutor.test.ts
index b63d265b..6f72a2fc 100644
--- a/src/store/execution/__tests__/nanoBananaExecutor.test.ts
+++ b/src/store/execution/__tests__/nanoBananaExecutor.test.ts
@@ -216,7 +216,8 @@ describe("executeNanoBanana", () => {
     const body = JSON.parse(mockFetch.mock.calls[0][1].body);
     expect(body.prompt).toContain("right side key light");
     expect(body.prompt).toContain("70% brightness");
-    expect(body.prompt).toContain("Preserve the original subject identity");
+    expect(body.prompt).toContain("same exact person");
+    expect(body.prompt).toContain("Only change illumination");
   });
 
   it("uses NewApiWG default for legacy image nodes when Gemini is not configured", async () => {
diff --git a/src/utils/__tests__/lighting.test.ts b/src/utils/__tests__/lighting.test.ts
index 25f6a76b..16e4729a 100644
--- a/src/utils/__tests__/lighting.test.ts
+++ b/src/utils/__tests__/lighting.test.ts
@@ -38,10 +38,13 @@ describe("lighting utilities", () => {
       mainLightDirection: "front",
     });
 
-    expect(prompt).toContain("Image editing task");
+    expect(prompt).toContain("STRICT image-to-image relighting task");
     expect(prompt).toContain("uploaded image");
     expect(prompt).toContain("relight the uploaded image");
-    expect(prompt).toContain("Only change the lighting");
-    expect(prompt).toContain("Do not add new people or objects");
+    expect(prompt).toContain("same exact person");
+    expect(prompt).toContain("Preserve the original composition");
+    expect(prompt).toContain("Only change illumination");
+    expect(prompt).toContain("lighting reference only");
+    expect(prompt).toContain("Do not add or remove people or objects");
   });
 });
diff --git a/src/utils/lighting.ts b/src/utils/lighting.ts
index 6d3fc96f..40c5f5d8 100644
--- a/src/utils/lighting.ts
+++ b/src/utils/lighting.ts
@@ -27,7 +27,7 @@ export const LIGHTING_PRESETS: LightingPreset[] = [
       mainLightDirection: "front",
       lightPosition: { x: 0, y: 0, z: 1 },
       beamAngle: 45,
-      smartPrompt: "柯达胶片质感",
+      smartPrompt: "柯达胶片感的曝光和柔和高光，只调整打光",
     },
   },
   {
@@ -71,7 +71,7 @@ export const LIGHTING_PRESETS: LightingPreset[] = [
       lightPosition: { x: 0, y: 0, z: 1 },
       beamAngle: 45,
       rimLight: false,
-      smartPrompt: "让画面拥有《银翼杀手2045》同款打光，极简背景",
+      smartPrompt: "《银翼杀手2045》同款青紫高反差打光，只调整光影",
     },
   },
   {
@@ -113,7 +113,7 @@ export const LIGHTING_PRESETS: LightingPreset[] = [
       mainLightDirection: "front",
       lightPosition: { x: 0, y: 0, z: 1 },
       beamAngle: 45,
-      smartPrompt: "让画面光影变成“黄金时刻”",
+      smartPrompt: "黄金时刻暖色光影，只调整光照和阴影",
     },
   },
   {
@@ -127,7 +127,7 @@ export const LIGHTING_PRESETS: LightingPreset[] = [
       mainLightDirection: "front",
       lightPosition: { x: 0, y: 0, z: 1 },
       beamAngle: 45,
-      smartPrompt: "让画面质感变成清晨同款冷灰色调",
+      smartPrompt: "清晨冷灰色温和柔和阴影，只调整光照和色温",
     },
   },
 ];
@@ -236,11 +236,13 @@ export function buildOptimizedLightingPrompt(
     : "User intent: relight the uploaded image according to the lighting plan.";
 
   return [
-    "Image editing task: use the uploaded image as the source image and generate one finished relit image.",
+    "STRICT image-to-image relighting task: use the uploaded image as the locked source image.",
     userIntent,
     lightingPrompt,
-    "Preserve the original subject identity, pose, clothing, composition, camera angle, and image style as much as possible.",
-    "Only change the lighting, shadow direction, highlight intensity, and ambient mood required by the lighting plan.",
-    "Do not add new people or objects, do not crop the subject, do not change the character design, and do not create a different scene.",
+    "The output must show the same exact person from the source image: identical face identity, facial features, age, expression, hair, body shape, hands, pose, clothing, accessories, and camera/phone.",
+    "Preserve the original composition, camera angle, crop, background, object layout, readable text overlays, and image style.",
+    "Only change illumination: light direction, brightness, color temperature, shadows, highlights, reflections, and ambient lighting mood required by the lighting plan.",
+    "Treat any preset or style wording as a lighting reference only, not permission to redesign the person, outfit, background, pose, scene, or photographic composition.",
+    "Do not add or remove people or objects, do not beautify or re-age the person, do not replace the face, do not change hairstyle or clothing, do not crop the subject, and do not create a different scene.",
   ].join("\n");
 }