diff --git a/components/public/material-poster.tsx b/components/public/material-poster.tsx
index 4d457a5..a041c1c 100644
--- a/components/public/material-poster.tsx
+++ b/components/public/material-poster.tsx
@@ -7,16 +7,10 @@ import type {
   CatalogAscensionGroup,
   CatalogBaseStat,
 } from "@/lib/catalog/lunaris";
+import { mergePosterMaterials, type PosterMaterial } from "@/lib/material-poster";
 import { accentGradient } from "@/lib/overview-image";
 import { cn } from "@/lib/utils";
 
-type PosterMaterial = {
-  key: string;
-  amount: number;
-  name: string;
-  imageUrl: string | null;
-};
-
 export type PosterBlendMode = "normal" | "multiply" | "screen" | "overlay" | "darken" | "lighten" | "color-dodge" | "color-burn" | "hard-light" | "soft-light" | "difference" | "exclusion" | "hue" | "saturation" | "color" | "luminosity";
 
 type PosterCharacter = {
@@ -80,7 +74,9 @@ export function MaterialPoster({
 }) {
   const dragStart = useRef<{ pointerId: number; x: number; y: number; offsetX: number; offsetY: number } | null>(null);
   const stats = character.baseStats.slice(0, 4);
-  const materials = [...character.ascension, ...character.leveling].flatMap((group) => group.items);
+  const materials = mergePosterMaterials(
+    [...character.ascension, ...character.leveling].flatMap((group) => group.items),
+  );
   const background = `linear-gradient(180deg, ${topColors[0]} 0%, ${topColors[1]} 22%, rgba(0,0,0,0) 42%, rgba(0,0,0,0) 62%, ${bottomColors[0]} 88%, ${bottomColors[1]} 100%)`;
 
   function handlePointerDown(event: PointerEvent<HTMLDivElement>) {
diff --git a/lib/material-poster.test.ts b/lib/material-poster.test.ts
new file mode 100644
index 0000000..874e34e
--- /dev/null
+++ b/lib/material-poster.test.ts
@@ -0,0 +1,23 @@
+import { describe, expect, it } from "vitest";
+
+import { mergePosterMaterials } from "@/lib/material-poster";
+
+describe("mergePosterMaterials", () => {
+  it("combines amounts when leveling and talent materials use the same image", () => {
+    expect(mergePosterMaterials([
+      { key: "talent", amount: 9, name: "Talent", imageUrl: "/shared.webp" },
+      { key: "leveling", amount: 18, name: "Leveling", imageUrl: "/shared.webp" },
+    ])).toEqual([
+      { key: "talent", amount: 27, name: "Talent", imageUrl: "/shared.webp" },
+    ]);
+  });
+
+  it("keeps materials without images separate", () => {
+    const materials = [
+      { key: "first", amount: 1, name: "First", imageUrl: null },
+      { key: "second", amount: 2, name: "Second", imageUrl: null },
+    ];
+
+    expect(mergePosterMaterials(materials)).toEqual(materials);
+  });
+});
diff --git a/lib/material-poster.ts b/lib/material-poster.ts
new file mode 100644
index 0000000..798a108
--- /dev/null
+++ b/lib/material-poster.ts
@@ -0,0 +1,33 @@
+export type PosterMaterial = {
+  key: string;
+  amount: number;
+  name: string;
+  imageUrl: string | null;
+};
+
+export function mergePosterMaterials(materials: PosterMaterial[]): PosterMaterial[] {
+  const merged: PosterMaterial[] = [];
+  const indexByImageUrl = new Map<string, number>();
+
+  for (const material of materials) {
+    if (!material.imageUrl) {
+      merged.push(material);
+      continue;
+    }
+
+    const existingIndex = indexByImageUrl.get(material.imageUrl);
+    if (existingIndex === undefined) {
+      indexByImageUrl.set(material.imageUrl, merged.length);
+      merged.push(material);
+      continue;
+    }
+
+    const existing = merged[existingIndex];
+    merged[existingIndex] = {
+      ...existing,
+      amount: existing.amount + material.amount,
+    };
+  }
+
+  return merged;
+}