diff --git a/client/src/pages/ProjectWorkspace.tsx b/client/src/pages/ProjectWorkspace.tsx
index d2b4013..db0283a 100644
--- a/client/src/pages/ProjectWorkspace.tsx
+++ b/client/src/pages/ProjectWorkspace.tsx
@@ -11,7 +11,7 @@ import { trpc } from "@/lib/trpc";
 import {
   ArrowLeft, Play, Pause, SkipBack, SkipForward,
   Layers, Eye, EyeOff, Lock, Unlock,
-  Wand2, MessageSquare, Settings, Film,
+  Wand2, MessageSquare, Settings, Film, Sparkles,
   Scissors, Image, Users, Bot, Download,
   ChevronLeft, ChevronRight, Loader2
 } from "lucide-react";
@@ -310,6 +310,10 @@ export default function ProjectWorkspace() {
                   <Users className="h-3.5 w-3.5" />
                   Personnages
                 </TabsTrigger>
+                <TabsTrigger value="generate" className="gap-1 text-xs">
+                  <Wand2 className="h-3.5 w-3.5" />
+                  Génération IA
+                </TabsTrigger>
               </TabsList>
               <TabsContent value="timeline" className="flex-1 m-0 overflow-hidden">
                 <TimelinePanel
@@ -334,6 +338,9 @@ export default function ProjectWorkspace() {
               <TabsContent value="characters" className="flex-1 m-0 overflow-hidden p-3">
                 <CharactersPanel projectId={projectId} />
               </TabsContent>
+              <TabsContent value="generate" className="flex-1 m-0 overflow-hidden p-3">
+                <GenerationPanel projectId={projectId} selectedFrame={selectedFrame} />
+              </TabsContent>
             </Tabs>
           </div>
         </div>
@@ -593,6 +600,7 @@ function CharactersPanel({ projectId }: { projectId: number }) {
         )}
 
         {/* Full-screen preview modal */}
+        {/* eslint-disable-next-line @typescript-eslint/no-use-before-define */}
         {previewUrl && (
           <div
             className="fixed inset-0 z-50 bg-black/80 flex items-center justify-center p-8 cursor-pointer"
@@ -612,3 +620,123 @@ function CharactersPanel({ projectId }: { projectId: number }) {
     </ScrollArea>
   );
 }
+
+// Generation panel for AI-powered background/character regeneration
+function GenerationPanel({ projectId, selectedFrame }: { projectId: number; selectedFrame: number }) {
+  const [bgPrompt, setBgPrompt] = useState("Redessiner cet arrière-plan dans un style Studio Ghibli, couleurs douces et atmosphère onirique");
+  const [charPrompt, setCharPrompt] = useState("Redessiner ce personnage dans un style moderne, lignes nettes et couleurs vives");
+  const [bgStyle, setBgStyle] = useState("Studio Ghibli");
+  const [resultUrl, setResultUrl] = useState<string | null>(null);
+
+  const { data: characters } = trpc.characters.list.useQuery({ projectId });
+  const [selectedCharId, setSelectedCharId] = useState<number | undefined>();
+
+  const regenBg = trpc.generation.regenerateBackground.useMutation({
+    onSuccess: (data) => {
+      setResultUrl(data.resultUrl);
+      toast.success("Arrière-plan regénéré !");
+    },
+    onError: (err) => toast.error(`Erreur: ${err.message}`),
+  });
+
+  const regenChar = trpc.generation.regenerateCharacter.useMutation({
+    onSuccess: (data) => {
+      setResultUrl(data.resultUrl);
+      toast.success("Personnage redessiné !");
+    },
+    onError: (err) => toast.error(`Erreur: ${err.message}`),
+  });
+
+  const isGenerating = regenBg.isPending || regenChar.isPending;
+
+  return (
+    <ScrollArea className="h-full">
+      <div className="grid grid-cols-2 gap-3">
+        <div className="text-xs text-muted-foreground font-mono col-span-2 flex items-center gap-2">
+          <Wand2 className="h-3.5 w-3.5 text-primary" />
+          Frame sélectionnée : #{selectedFrame + 1}
+        </div>
+
+        {/* Background regeneration */}
+        <div className="p-3 rounded-lg border border-border bg-card/50 space-y-2">
+          <div className="flex items-center gap-2">
+            <Image className="h-4 w-4 text-blue-400" />
+            <span className="text-sm font-medium">Regénérer l'arrière-plan</span>
+          </div>
+          <textarea
+            value={bgPrompt}
+            onChange={(e) => setBgPrompt(e.target.value)}
+            placeholder="Décrivez le nouveau style d'arrière-plan..."
+            className="w-full px-2 py-1.5 text-xs rounded border border-border bg-input resize-none h-12"
+          />
+          <div className="flex items-center gap-2">
+            <input
+              type="text"
+              value={bgStyle}
+              onChange={(e) => setBgStyle(e.target.value)}
+              placeholder="Style"
+              className="flex-1 px-2 py-1 text-xs rounded border border-border bg-input"
+            />
+            <Button
+              size="sm"
+              className="gap-1 text-xs h-7"
+              disabled={isGenerating || !bgPrompt.trim()}
+              onClick={() => regenBg.mutate({ projectId, frameIndex: selectedFrame, prompt: bgPrompt, style: bgStyle })}
+            >
+              {regenBg.isPending ? <Loader2 className="h-3 w-3 animate-spin" /> : <Wand2 className="h-3 w-3" />}
+              Générer le fond
+            </Button>
+          </div>
+        </div>
+
+        {/* Character regeneration */}
+        <div className="p-3 rounded-lg border border-border bg-card/50 space-y-2">
+          <div className="flex items-center gap-2">
+            <Users className="h-4 w-4 text-green-400" />
+            <span className="text-sm font-medium">Redessiner le personnage</span>
+          </div>
+          <textarea
+            value={charPrompt}
+            onChange={(e) => setCharPrompt(e.target.value)}
+            placeholder="Décrivez le nouveau style du personnage..."
+            className="w-full px-2 py-1.5 text-xs rounded border border-border bg-input resize-none h-12"
+          />
+          <div className="flex items-center gap-2">
+            {characters && characters.length > 0 && (
+              <select
+                value={selectedCharId || ""}
+                onChange={(e) => setSelectedCharId(e.target.value ? Number(e.target.value) : undefined)}
+                className="flex-1 px-2 py-1 text-xs rounded border border-border bg-input"
+              >
+                <option value="">Sans référence</option>
+                {characters.map(c => (
+                  <option key={c.id} value={c.id}>{c.name}</option>
+                ))}
+              </select>
+            )}
+            <Button
+              size="sm"
+              className="gap-1 text-xs h-7"
+              disabled={isGenerating || !charPrompt.trim()}
+              onClick={() => regenChar.mutate({ projectId, frameIndex: selectedFrame, prompt: charPrompt, characterId: selectedCharId })}
+            >
+              {regenChar.isPending ? <Loader2 className="h-3 w-3 animate-spin" /> : <Wand2 className="h-3 w-3" />}
+              Générer le personnage
+            </Button>
+          </div>
+        </div>
+
+        {/* Result preview */}
+        {resultUrl && (
+          <div className="p-3 rounded-lg border border-primary/30 bg-card/50 space-y-2 col-span-2">
+            <div className="flex items-center gap-2">
+              <Sparkles className="h-4 w-4 text-primary" />
+              <span className="text-sm font-medium">Résultat généré</span>
+            </div>
+            <img src={resultUrl} alt="Résultat" className="max-h-32 rounded border border-border" />
+          </div>
+        )}
+      </div>
+    </ScrollArea>
+  );
+}
diff --git a/server/routers.ts b/server/routers.ts
index 019b19d..1c3b847 100644
--- a/server/routers.ts
+++ b/server/routers.ts
@@ -520,6 +520,104 @@ Réponds de manière concise et technique, en français. Propose des actions con
       }),
   }),
 
+  // ============ GENERATION ============
+  generation: router({
+    regenerateBackground: protectedProcedure
+      .input(z.object({
+        projectId: z.number(),
+        frameIndex: z.number(),
+        prompt: z.string().min(1),
+        style: z.string().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const frame = await db.getFrame(input.projectId, input.frameIndex);
+        if (!frame?.originalUrl) throw new TRPCError({ code: "NOT_FOUND", message: "Frame not found" });
+
+        const { regenerateBackground } = await import("./segmentationService");
+        const resultUrl = await regenerateBackground(
+          frame.originalUrl,
+          input.prompt,
+          input.style || "same art style"
+        );
+
+        await db.updateFrame(frame.id, { regeneratedBgUrl: resultUrl });
+        await db.createGenerationJob({
+          projectId: input.projectId,
+          type: "background_gen",
+          prompt: input.prompt,
+          status: "completed",
+          resultUrl,
+        });
+
+        return { success: true, resultUrl };
+      }),
+
+    regenerateCharacter: protectedProcedure
+      .input(z.object({
+        projectId: z.number(),
+        frameIndex: z.number(),
+        prompt: z.string().min(1),
+        characterId: z.number().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const frame = await db.getFrame(input.projectId, input.frameIndex);
+        if (!frame?.originalUrl) throw new TRPCError({ code: "NOT_FOUND", message: "Frame not found" });
+
+        let characterSheet: string | undefined;
+        let characterConfig: { name: string; modelType: "lora" | "ip_adapter" | "none" } | undefined;
+
+        if (input.characterId) {
+          const chars = await db.listCharacters(input.projectId);
+          const char = chars.find(c => c.id === input.characterId);
+          if (char) {
+            characterSheet = char.referenceSheetUrl || undefined;
+            characterConfig = { name: char.name, modelType: (char.modelType as any) || "none" };
+          }
+        }
+
+        const { regenerateCharacter } = await import("./segmentationService");
+        const resultUrl = await regenerateCharacter(
+          frame.originalUrl,
+          input.prompt,
+          characterSheet,
+          frame.maskUrl || undefined,
+          characterConfig
+        );
+
+        await db.updateFrame(frame.id, { regeneratedFgUrl: resultUrl });
+        await db.createGenerationJob({
+          projectId: input.projectId,
+          type: "character_gen",
+          prompt: input.prompt,
+          status: "completed",
+          resultUrl,
+        });
+
+        return { success: true, resultUrl };
+      }),
+
+    inpaintBackground: protectedProcedure
+      .input(z.object({
+        projectId: z.number(),
+        frameIndex: z.number(),
+        prompt: z.string().optional(),
+      }))
+      .mutation(async ({ input }) => {
+        const frame = await db.getFrame(input.projectId, input.frameIndex);
+        if (!frame?.originalUrl) throw new TRPCError({ code: "NOT_FOUND", message: "Frame not found" });
+
+        const { inpaintBackground } = await import("./segmentationService");
+        const resultUrl = await inpaintBackground(
+          frame.originalUrl,
+          frame.maskUrl || frame.originalUrl,
+          input.prompt
+        );
+
+        await db.updateFrame(frame.id, { backgroundUrl: resultUrl });
+        return { success: true, resultUrl };
+      }),
+  }),
+
   // ============ EXPORT ============
   export: router({
     start: protectedProcedure
diff --git a/server/segmentationService.ts b/server/segmentationService.ts
index 5aad6d4..28f26df 100644
--- a/server/segmentationService.ts
+++ b/server/segmentationService.ts
@@ -11,8 +11,15 @@
 
 import { generateImage } from "./_core/imageGeneration";
 import { invokeLLM } from "./_core/llm";
+import { storageGetSignedUrl } from "./storage";
 import { getServicesConfig, callExternalSAM2, getCharacterGenerationStrategy, buildPoseConstraints } from "./servicesConfig";
 
+async function resolveToAbsoluteUrl(url: string): Promise<string> {
+  if (url.startsWith("http")) return url;
+  const key = url.replace(/^\/manus-storage\//, "");
+  return storageGetSignedUrl(key);
+}
+
 export interface SegmentationResult {
   maskUrl: string;
   foregroundUrl: string;
@@ -123,33 +130,24 @@ export async function inpaintBackground(
   maskUrl: string,
   prompt?: string
 ): Promise<string> {
-  try {
-    // Build a detailed prompt that instructs the model to use the mask
-    const inpaintPrompt = [
-      prompt || "Clean background plate, seamlessly fill the masked areas",
-      "Maintain original art style, color palette, and perspective.",
-      "The second reference image is the mask: white areas should be inpainted,",
-      "black areas should remain unchanged. Produce a complete background without characters.",
-    ].join(" ");
+  const absoluteFrameUrl = await resolveToAbsoluteUrl(frameUrl);
+  const absoluteMaskUrl = await resolveToAbsoluteUrl(maskUrl);
 
-    const result = await generateImage({
-      prompt: inpaintPrompt,
-      originalImages: [
-        {
-          url: frameUrl,
-          mimeType: "image/png",
-        },
-        {
-          url: maskUrl,
-          mimeType: "image/png",
-        },
-      ],
-    });
-    return result.url || frameUrl;
-  } catch (error) {
-    console.error("[Segmentation] Inpainting failed:", error);
-    return frameUrl; // Fallback to original
-  }
+  const inpaintPrompt = [
+    prompt || "Clean background plate, seamlessly fill the masked areas",
+    "Maintain original art style, color palette, and perspective.",
+    "The second reference image is the mask: white areas should be inpainted,",
+    "black areas should remain unchanged. Produce a complete background without characters.",
+  ].join(" ");
+
+  const result = await generateImage({
+    prompt: inpaintPrompt,
+    originalImages: [
+      { url: absoluteFrameUrl, mimeType: "image/jpeg" },
+      { url: absoluteMaskUrl, mimeType: "image/jpeg" },
+    ],
+  });
+  return result.url || frameUrl;
 }
 
 /**
@@ -161,29 +159,25 @@ export async function regenerateBackground(
   prompt: string,
   style: string = "same art style"
 ): Promise<string> {
-  try {
-    const fullPrompt = [
-      prompt,
-      `Maintain exact same perspective, composition, and spatial layout.`,
-      `Style: ${style}.`,
-      `This is a background for animation - no characters should be present.`,
-      `Keep the same camera angle and depth of field as the reference.`,
-    ].join(" ");
-    
-    const result = await generateImage({
-      prompt: fullPrompt,
-      originalImages: [
-        {
-          url: referenceFrameUrl,
-          mimeType: "image/png",
-        },
-      ],
-    });
-    return result.url || referenceFrameUrl;
-  } catch (error) {
-    console.error("[Segmentation] Background regeneration failed:", error);
-    return referenceFrameUrl;
-  }
+  const absoluteUrl = await resolveToAbsoluteUrl(referenceFrameUrl);
+  const fullPrompt = [
+    prompt,
+    `Maintain exact same perspective, composition, and spatial layout.`,
+    `Style: ${style}.`,
+    `This is a background for animation - no characters should be present.`,
+    `Keep the same camera angle and depth of field as the reference.`,
+  ].join(" ");
+
+  const result = await generateImage({
+    prompt: fullPrompt,
+    originalImages: [
+      {
+        url: absoluteUrl,
+        mimeType: "image/jpeg",
+      },
+    ],
+  });
+  return result.url || referenceFrameUrl;
 }
 
 /**
@@ -198,59 +192,54 @@ export async function regenerateCharacter(
   maskUrl?: string,
   characterConfig?: { name: string; modelType: "lora" | "ip_adapter" | "none" }
 ): Promise<string> {
-  try {
-    const images: Array<{ url: string; mimeType: "image/png" | "image/jpeg" }> = [
-      { url: characterFrameUrl, mimeType: "image/png" },
-    ];
-    
-    // Determine generation strategy based on character config
-    let strategyPrefix = "";
-    if (characterConfig) {
-      const strategy = getCharacterGenerationStrategy(
-        characterConfig.modelType,
-        characterConfig.name,
-        characterSheet
-      );
-      strategyPrefix = strategy.promptPrefix;
-      // Add strategy-specific reference images
-      for (const ref of strategy.referenceImages) {
-        if (!images.some(img => img.url === ref.url)) {
-          images.push(ref);
-        }
-      }
-    } else if (characterSheet) {
-      images.push({ url: characterSheet, mimeType: "image/png" });
-    }
-    
-    // Add mask to indicate which area contains the character
-    if (maskUrl) {
-      images.push({ url: maskUrl, mimeType: "image/png" });
-    }
+  const absoluteFrameUrl = await resolveToAbsoluteUrl(characterFrameUrl);
+  const images: Array<{ url: string; mimeType: "image/png" | "image/jpeg" }> = [
+    { url: absoluteFrameUrl, mimeType: "image/jpeg" },
+  ];
 
-    // Build pose-constrained prompt
-    const basePrompt = [
-      strategyPrefix,
-      prompt,
-      characterSheet && !characterConfig ? "Match the character reference sheet style exactly." : "",
-      maskUrl ? "The mask image indicates the character silhouette to preserve." : "",
-      "Output only the character on a transparent background.",
-    ].filter(Boolean).join(" ");
-    
-    const fullPrompt = buildPoseConstraints(basePrompt, {
-      preservePose: true,
-      preserveProportions: true,
-      preservePosition: true,
-    });
-    
-    const result = await generateImage({
-      prompt: fullPrompt,
-      originalImages: images,
-    });
-    return result.url || characterFrameUrl;
-  } catch (error) {
-    console.error("[Segmentation] Character regeneration failed:", error);
-    return characterFrameUrl;
+  let strategyPrefix = "";
+  if (characterConfig) {
+    const strategy = getCharacterGenerationStrategy(
+      characterConfig.modelType,
+      characterConfig.name,
+      characterSheet
+    );
+    strategyPrefix = strategy.promptPrefix;
+    for (const ref of strategy.referenceImages) {
+      const absRef = await resolveToAbsoluteUrl(ref.url);
+      if (!images.some(img => img.url === absRef)) {
+        images.push({ url: absRef, mimeType: ref.mimeType });
+      }
+    }
+  } else if (characterSheet) {
+    const absSheet = await resolveToAbsoluteUrl(characterSheet);
+    images.push({ url: absSheet, mimeType: "image/jpeg" });
   }
+
+  if (maskUrl) {
+    const absMask = await resolveToAbsoluteUrl(maskUrl);
+    images.push({ url: absMask, mimeType: "image/jpeg" });
+  }
+
+  const basePrompt = [
+    strategyPrefix,
+    prompt,
+    characterSheet && !characterConfig ? "Match the character reference sheet style exactly." : "",
+    maskUrl ? "The mask image indicates the character silhouette to preserve." : "",
+    "Output only the character on a transparent background.",
+  ].filter(Boolean).join(" ");
+
+  const fullPrompt = buildPoseConstraints(basePrompt, {
+    preservePose: true,
+    preserveProportions: true,
+    preservePosition: true,
+  });
+
+  const result = await generateImage({
+    prompt: fullPrompt,
+    originalImages: images,
+  });
+  return result.url || characterFrameUrl;
 }
 
 /**