diff --git a/resources/cosmetics/cosmetic_pack/test/manifest.json b/resources/cosmetics/cosmetic_pack/test/manifest.json
new file mode 100644
index 000000000..14fcdc56d
--- /dev/null
+++ b/resources/cosmetics/cosmetic_pack/test/manifest.json
@@ -0,0 +1,29 @@
+{
+  "id": "test",
+  "name": "Test",
+  "assets": {
+    "structure": {
+      "img": {
+        "port": "structure/test.png",
+        "city": "structure/test.png",
+        "factory": "structure/test.png",
+        "missilesilo": "structure/test.png",
+        "defensepost": "structure/test.png",
+        "samlauncher": "structure/test.png"
+      }
+    },
+    "sprites": {
+      "transportship": "sprites/test.png",
+      "warship": "sprites/test.png",
+      "sammissile": "sprites/test.png",
+      "atombomb": "sprites/test.png",
+      "hydrogenbomb": "sprites/test.png",
+      "tradeship": "sprites/test.png",
+      "mirv": "sprites/test.png",
+      "engine": "sprites/test.png",
+      "carriage": "sprites/test.png",
+      "loadedcarriage": "sprites/test.png"
+    },
+    "audio": {}
+  }
+}
diff --git a/resources/cosmetics/cosmetic_pack/test/sprites/test.png b/resources/cosmetics/cosmetic_pack/test/sprites/test.png
new file mode 100644
index 000000000..5bba75c4c
Binary files /dev/null and b/resources/cosmetics/cosmetic_pack/test/sprites/test.png differ
diff --git a/resources/cosmetics/cosmetic_pack/test/structure/test.png b/resources/cosmetics/cosmetic_pack/test/structure/test.png
new file mode 100644
index 000000000..c915f2cc5
Binary files /dev/null and b/resources/cosmetics/cosmetic_pack/test/structure/test.png differ
diff --git a/src/client/CosmeticPackLoader.ts b/src/client/CosmeticPackLoader.ts
new file mode 100644
index 000000000..0cf5b5c25
--- /dev/null
+++ b/src/client/CosmeticPackLoader.ts
@@ -0,0 +1,62 @@
+import test from "../../resources/cosmetics/cosmetic_pack/test/manifest.json";
+import {
+  CosmeticManifest,
+  CosmeticManifestSchema,
+} from "../core/CosmeticSchemas";
+
+function parseCosmeticManifest(json: unknown): CosmeticManifest {
+  const res = CosmeticManifestSchema.safeParse(json);
+  if (!res.success) {
+    throw new Error(`Invalid CosmeticManifest: ${res.error.message}`);
+  }
+  return res.data;
+}
+
+function fetchManifest(packId: string): CosmeticManifest | undefined {
+  switch (packId) {
+    case "base":
+      return;
+    case "test":
+      return parseCosmeticManifest(test) as CosmeticManifest;
+  }
+  return;
+}
+
+export async function resolveCosmeticUrl(
+  packId: string | null,
+  key: string | undefined,
+  fallback: string,
+): Promise<string> {
+  if (!packId || key === undefined) {
+    return fallback;
+  }
+  try {
+    const manifest = fetchManifest(packId);
+    if (!manifest) {
+      return fallback;
+    }
+    // Determine category and subKey from the first "/" only.
+    const firstSlash = key.indexOf("/");
+    if (firstSlash === -1) {
+      return fallback;
+    }
+    const category = key.slice(0, firstSlash);
+    const subKey = key.slice(firstSlash + 1);
+
+    const table = (manifest.assets as Record<string, any>)[category];
+    if (table) {
+      const parts = subKey.split("/");
+      let current: any = table;
+      for (const part of parts) {
+        if (current === null) break;
+        current = current[part];
+      }
+      if (typeof current === "string") {
+        return `/cosmetics/cosmetic_pack/${packId}/${current}`;
+      }
+    }
+  } catch (e) {
+    console.warn("[cosmetics] manifest load failed", e);
+  }
+  return fallback;
+}
diff --git a/src/client/graphics/SpriteLoader.ts b/src/client/graphics/SpriteLoader.ts
index 29d5b7791..27165e8da 100644
--- a/src/client/graphics/SpriteLoader.ts
+++ b/src/client/graphics/SpriteLoader.ts
@@ -12,6 +12,7 @@ import warshipSprite from "../../../resources/sprites/warship.png";
 import { Theme } from "../../core/configuration/Config";
 import { TrainType, UnitType } from "../../core/game/Game";
 import { UnitView } from "../../core/game/GameView";
+import { resolveCosmeticUrl } from "../CosmeticPackLoader";
 
 // Can't reuse TrainType because "loaded" is not a type, just an attribute
 const TrainTypeSprite = {
@@ -22,17 +23,31 @@ const TrainTypeSprite = {
 
 type TrainTypeSprite = (typeof TrainTypeSprite)[keyof typeof TrainTypeSprite];
 
-const SPRITE_CONFIG: Partial<Record<UnitType | TrainTypeSprite, string>> = {
-  [UnitType.TransportShip]: transportShipSprite,
-  [UnitType.Warship]: warshipSprite,
-  [UnitType.SAMMissile]: samMissileSprite,
-  [UnitType.AtomBomb]: atomBombSprite,
-  [UnitType.HydrogenBomb]: hydrogenBombSprite,
-  [UnitType.TradeShip]: tradeShipSprite,
-  [UnitType.MIRV]: mirvSprite,
-  [TrainTypeSprite.Engine]: trainEngineSprite,
-  [TrainTypeSprite.Carriage]: trainCarriageSprite,
-  [TrainTypeSprite.LoadedCarriage]: trainLoadedCarriageSprite,
+const SPRITE_CONFIG: Partial<
+  Record<UnitType | TrainTypeSprite, { key: string; url: string }>
+> = {
+  [UnitType.TransportShip]: {
+    key: "sprites/transportship",
+    url: transportShipSprite,
+  },
+  [UnitType.Warship]: { key: "sprites/warship", url: warshipSprite },
+  [UnitType.SAMMissile]: { key: "sprites/sammissile", url: samMissileSprite },
+  [UnitType.AtomBomb]: { key: "sprites/atombomb", url: atomBombSprite },
+  [UnitType.HydrogenBomb]: {
+    key: "sprites/hydrogenbomb",
+    url: hydrogenBombSprite,
+  },
+  [UnitType.TradeShip]: { key: "sprites/tradeship", url: tradeShipSprite },
+  [UnitType.MIRV]: { key: "sprites/mirv", url: mirvSprite },
+  [TrainTypeSprite.Engine]: { key: "sprites/engine", url: trainEngineSprite },
+  [TrainTypeSprite.Carriage]: {
+    key: "sprites/carriage",
+    url: trainCarriageSprite,
+  },
+  [TrainTypeSprite.LoadedCarriage]: {
+    key: "sprites/loadedcarriage",
+    url: trainLoadedCarriageSprite,
+  },
 };
 
 const spriteMap: Map<UnitType | TrainTypeSprite, ImageBitmap> = new Map();
@@ -43,14 +58,20 @@ export const loadAllSprites = async (): Promise<void> => {
   const totalSprites = entries.length;
   let loadedCount = 0;
 
+  const packId: string | null = "test"; // TODO: wire from server/client selection
+
   await Promise.all(
-    entries.map(async ([unitType, url]) => {
+    entries.map(async ([unitType, value]) => {
       const typedUnitType = unitType as UnitType | TrainTypeSprite;
 
-      if (!url || url === "") {
-        console.warn(`No sprite URL for ${typedUnitType}, skipping...`);
+      const key = value?.key;
+      const fallbackUrl = value?.url;
+
+      if (!fallbackUrl) {
+        console.warn(`No sprite url for ${typedUnitType}, skipping...`);
         return;
       }
+      const url = await resolveCosmeticUrl(packId, key, fallbackUrl);
 
       try {
         const img = new Image();
diff --git a/src/client/graphics/layers/StructureLayer.ts b/src/client/graphics/layers/StructureLayer.ts
index dbfaf5cb7..843dc57f1 100644
--- a/src/client/graphics/layers/StructureLayer.ts
+++ b/src/client/graphics/layers/StructureLayer.ts
@@ -1,19 +1,19 @@
 import { colord, Colord } from "colord";
-import { Theme } from "../../../core/configuration/Config";
-import { EventBus } from "../../../core/EventBus";
-import { TransformHandler } from "../TransformHandler";
-import { Layer } from "./Layer";
-
 import cityIcon from "../../../../resources/images/buildings/cityAlt1.png";
 import factoryIcon from "../../../../resources/images/buildings/factoryAlt1.png";
 import shieldIcon from "../../../../resources/images/buildings/fortAlt3.png";
 import anchorIcon from "../../../../resources/images/buildings/port1.png";
 import missileSiloIcon from "../../../../resources/images/buildings/silo1.png";
 import SAMMissileIcon from "../../../../resources/images/buildings/silo4.png";
+import { Theme } from "../../../core/configuration/Config";
+import { EventBus } from "../../../core/EventBus";
 import { Cell, UnitType } from "../../../core/game/Game";
 import { euclDistFN, isometricDistFN } from "../../../core/game/GameMap";
 import { GameUpdateType } from "../../../core/game/GameUpdates";
 import { GameView, UnitView } from "../../../core/game/GameView";
+import { resolveCosmeticUrl } from "../../CosmeticPackLoader";
+import { TransformHandler } from "../TransformHandler";
+import { Layer } from "./Layer";
 
 const underConstructionColor = colord({ r: 150, g: 150, b: 150 });
 
@@ -38,7 +38,7 @@ export class StructureLayer implements Layer {
   private tempContext: CanvasRenderingContext2D;
 
   // Configuration for supported unit types only
-  private readonly unitConfigs: Partial<Record<UnitType, UnitRenderConfig>> = {
+  private unitConfigs: Partial<Record<UnitType, UnitRenderConfig>> = {
     [UnitType.Port]: {
       icon: anchorIcon,
       borderRadius: BASE_BORDER_RADIUS * RADIUS_SCALE_FACTOR,
@@ -98,7 +98,8 @@ export class StructureLayer implements Layer {
     };
   }
 
-  private loadIconData() {
+  private async loadIconData() {
+    await this.applyCosmeticIcons();
     Object.entries(this.unitConfigs).forEach(([unitType, config]) => {
       this.loadIcon(unitType, config);
     });
@@ -122,6 +123,54 @@ export class StructureLayer implements Layer {
     this.redraw();
   }
 
+  private async applyCosmeticIcons(): Promise<void> {
+    const packSpec = "test";
+    this.unitConfigs[UnitType.Port] = {
+      ...this.unitConfigs[UnitType.Port]!,
+      icon: await resolveCosmeticUrl(
+        packSpec,
+        "structure/img/port",
+        anchorIcon,
+      ),
+    };
+    this.unitConfigs[UnitType.City] = {
+      ...this.unitConfigs[UnitType.City]!,
+      icon: await resolveCosmeticUrl(packSpec, "structure/img/city", cityIcon),
+    };
+    this.unitConfigs[UnitType.Factory] = {
+      ...this.unitConfigs[UnitType.Factory]!,
+      icon: await resolveCosmeticUrl(
+        packSpec,
+        "structure/img/factory",
+        factoryIcon,
+      ),
+    };
+    this.unitConfigs[UnitType.MissileSilo] = {
+      ...this.unitConfigs[UnitType.MissileSilo]!,
+      icon: await resolveCosmeticUrl(
+        packSpec,
+        "structure/img/missilesilo",
+        missileSiloIcon,
+      ),
+    };
+    this.unitConfigs[UnitType.DefensePost] = {
+      ...this.unitConfigs[UnitType.DefensePost]!,
+      icon: await resolveCosmeticUrl(
+        packSpec,
+        "structure/img/defensepost",
+        shieldIcon,
+      ),
+    };
+    this.unitConfigs[UnitType.SAMLauncher] = {
+      ...this.unitConfigs[UnitType.SAMLauncher]!,
+      icon: await resolveCosmeticUrl(
+        packSpec,
+        "structure/img/samlauncher",
+        SAMMissileIcon,
+      ),
+    };
+  }
+
   redraw() {
     console.log("structure layer redrawing");
     this.canvas = document.createElement("canvas");
diff --git a/src/core/CosmeticSchemas.ts b/src/core/CosmeticSchemas.ts
index a4bcd6762..0f575848b 100644
--- a/src/core/CosmeticSchemas.ts
+++ b/src/core/CosmeticSchemas.ts
@@ -94,3 +94,32 @@ export const DefaultPattern = {
   patternData: "AAAAAA",
   colorPalette: undefined,
 } satisfies PlayerPattern;
+
+const imageFile = z
+  .string()
+  .regex(/\.(png|webp|jpg|jpeg|gif)$/i, "Invalid image extension");
+const audioFile = z
+  .string()
+  .regex(/\.(ogg|mp3|wav|m4a)$/i, "Invalid audio extension");
+
+const ImageAssetNode: z.ZodType<any> = z.lazy(() =>
+  z.union([imageFile, z.record(z.string(), ImageAssetNode)]),
+);
+const AudioAssetNode: z.ZodType<any> = z.lazy(() =>
+  z.union([audioFile, z.record(z.string(), AudioAssetNode)]),
+);
+
+export const CosmeticManifestSchema = z
+  .object({
+    id: z.string(),
+    name: z.string(),
+    assets: z
+      .object({
+        structure: z.record(z.string(), ImageAssetNode).optional(),
+        sprites: z.record(z.string(), ImageAssetNode).optional(),
+        audio: z.record(z.string(), AudioAssetNode).optional(),
+      })
+      .strict(),
+  })
+  .strict();
+export type CosmeticManifest = z.infer<typeof CosmeticManifestSchema>;