diff --git a/package-lock.json b/package-lock.json
index b188b61..00dda65 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6,12 +6,14 @@
     "": {
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         "@prisma/client": "^5.13.0",
+        "@types/sharp": "^0.32.0",
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         "dotenv": "^16.4.5",
         "express": "^4.19.2",
         "jsonwebtoken": "^9.0.2",
         "prisma": "^5.13.0",
+        "sharp": "^0.33.4",
         "socket.io": "^4.7.5",
         "ts-node": "^10.9.2",
         "typescript": "^5.4.5",
@@ -38,6 +40,466 @@
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+      "optional": true,
+      "os": [
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     "node_modules/@jridgewell/resolve-uri": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz",
@@ -295,6 +757,16 @@
         "@types/send": "*"
       }
     },
+    "node_modules/@types/sharp": {
+      "version": "0.32.0",
+      "resolved": "https://registry.npmjs.org/@types/sharp/-/sharp-0.32.0.tgz",
+      "integrity": "sha512-OOi3kL+FZDnPhVzsfD37J88FNeZh6gQsGcLc95NbeURRGvmSjeXiDcyWzF2o3yh/gQAUn2uhh/e+CPCa5nwAxw==",
+      "deprecated": "This is a stub types definition. sharp provides its own type definitions, so you do not need this installed.",
+      "license": "MIT",
+      "dependencies": {
+        "sharp": "*"
+      }
+    },
     "node_modules/@types/socket.io": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/@types/socket.io/-/socket.io-3.0.2.tgz",
@@ -511,6 +983,47 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/color": {
+      "version": "4.2.3",
+      "resolved": "https://registry.npmjs.org/color/-/color-4.2.3.tgz",
+      "integrity": "sha512-1rXeuUUiGGrykh+CeBdu5Ie7OJwinCgQY0bc7GCRxy5xVHy+moaqkpL/jqQq0MtQOeYcrqEz4abc5f0KtU7W4A==",
+      "license": "MIT",
+      "dependencies": {
+        "color-convert": "^2.0.1",
+        "color-string": "^1.9.0"
+      },
+      "engines": {
+        "node": ">=12.5.0"
+      }
+    },
+    "node_modules/color-convert": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-2.0.1.tgz",
+      "integrity": "sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "~1.1.4"
+      },
+      "engines": {
+        "node": ">=7.0.0"
+      }
+    },
+    "node_modules/color-name": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.4.tgz",
+      "integrity": "sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==",
+      "license": "MIT"
+    },
+    "node_modules/color-string": {
+      "version": "1.9.1",
+      "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.9.1.tgz",
+      "integrity": "sha512-shrVawQFojnZv6xM40anx4CkoDP+fZsw/ZerEMsW/pyzsRbElpsL/DBVW7q3ExxwusdNXI3lXpuhEZkzs8p5Eg==",
+      "license": "MIT",
+      "dependencies": {
+        "color-name": "^1.0.0",
+        "simple-swizzle": "^0.2.2"
+      }
+    },
     "node_modules/concat-map": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
@@ -618,6 +1131,15 @@
         "npm": "1.2.8000 || >= 1.4.16"
       }
     },
+    "node_modules/detect-libc": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.0.3.tgz",
+      "integrity": "sha512-bwy0MGW55bG41VqxxypOsdSdGqLwXPI/focwgTYCFMbdUiBAxLg9CFzG08sz2aqzknwiX7Hkl0bQENjg8iLByw==",
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/diff": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
@@ -1028,6 +1550,12 @@
         "node": ">= 0.10"
       }
     },
+    "node_modules/is-arrayish": {
+      "version": "0.3.2",
+      "resolved": "https://registry.npmjs.org/is-arrayish/-/is-arrayish-0.3.2.tgz",
+      "integrity": "sha512-eVRqCvVlZbuw3GrM63ovNSNAeA1K16kaR/LRY/92w0zxQ5/1YzwblUX652i4Xs9RwAGjW9d9y6X88t8OaAJfWQ==",
+      "license": "MIT"
+    },
     "node_modules/is-binary-path": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
@@ -1575,6 +2103,46 @@
       "integrity": "sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==",
       "license": "ISC"
     },
+    "node_modules/sharp": {
+      "version": "0.33.4",
+      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.33.4.tgz",
+      "integrity": "sha512-7i/dt5kGl7qR4gwPRD2biwD2/SvBn3O04J77XKFgL2OnZtQw+AG9wnuS/csmu80nPRHLYE9E41fyEiG8nhH6/Q==",
+      "hasInstallScript": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "color": "^4.2.3",
+        "detect-libc": "^2.0.3",
+        "semver": "^7.6.0"
+      },
+      "engines": {
+        "libvips": ">=8.15.2",
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-darwin-arm64": "0.33.4",
+        "@img/sharp-darwin-x64": "0.33.4",
+        "@img/sharp-libvips-darwin-arm64": "1.0.2",
+        "@img/sharp-libvips-darwin-x64": "1.0.2",
+        "@img/sharp-libvips-linux-arm": "1.0.2",
+        "@img/sharp-libvips-linux-arm64": "1.0.2",
+        "@img/sharp-libvips-linux-s390x": "1.0.2",
+        "@img/sharp-libvips-linux-x64": "1.0.2",
+        "@img/sharp-libvips-linuxmusl-arm64": "1.0.2",
+        "@img/sharp-libvips-linuxmusl-x64": "1.0.2",
+        "@img/sharp-linux-arm": "0.33.4",
+        "@img/sharp-linux-arm64": "0.33.4",
+        "@img/sharp-linux-s390x": "0.33.4",
+        "@img/sharp-linux-x64": "0.33.4",
+        "@img/sharp-linuxmusl-arm64": "0.33.4",
+        "@img/sharp-linuxmusl-x64": "0.33.4",
+        "@img/sharp-wasm32": "0.33.4",
+        "@img/sharp-win32-ia32": "0.33.4",
+        "@img/sharp-win32-x64": "0.33.4"
+      }
+    },
     "node_modules/side-channel": {
       "version": "1.0.6",
       "resolved": "https://registry.npmjs.org/side-channel/-/side-channel-1.0.6.tgz",
@@ -1593,6 +2161,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/simple-swizzle": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.2.tgz",
+      "integrity": "sha512-JA//kQgZtbuY83m+xT+tXJkmJncGMTFT+C+g2h2R9uxkYIrE2yy9sgmcLhCnw57/WSD+Eh3J97FPEDFnbXnDUg==",
+      "license": "MIT",
+      "dependencies": {
+        "is-arrayish": "^0.3.1"
+      }
+    },
     "node_modules/simple-update-notifier": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/simple-update-notifier/-/simple-update-notifier-2.0.0.tgz",
@@ -1813,6 +2390,13 @@
         }
       }
     },
+    "node_modules/tslib": {
+      "version": "2.6.3",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.6.3.tgz",
+      "integrity": "sha512-xNvxJEOUiWPGhUuUdQgAJPKOOJfGnIyKySOc09XkKsgdUV/3E2zvwZYdejjmRgPCgcym1juLH3226yA7sEFJKQ==",
+      "license": "0BSD",
+      "optional": true
+    },
     "node_modules/type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
diff --git a/package.json b/package.json
index 35eff62..1d78e4a 100644
--- a/package.json
+++ b/package.json
@@ -6,12 +6,14 @@
   },
   "dependencies": {
     "@prisma/client": "^5.13.0",
+    "@types/sharp": "^0.32.0",
     "bcryptjs": "^2.4.3",
     "cors": "^2.8.5",
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
     "jsonwebtoken": "^9.0.2",
     "prisma": "^5.13.0",
+    "sharp": "^0.33.4",
     "socket.io": "^4.7.5",
     "ts-node": "^10.9.2",
     "typescript": "^5.4.5",
diff --git a/prisma/migrations/20240621191014_init/migration.sql b/prisma/migrations/20240629190323_init/migration.sql
similarity index 90%
rename from prisma/migrations/20240621191014_init/migration.sql
rename to prisma/migrations/20240629190323_init/migration.sql
index aa985ad..554e876 100644
--- a/prisma/migrations/20240621191014_init/migration.sql
+++ b/prisma/migrations/20240629190323_init/migration.sql
@@ -1,16 +1,6 @@
--- CreateTable
-CREATE TABLE `ObjectGroup` (
-    `id` INTEGER NOT NULL AUTO_INCREMENT,
-    `name` VARCHAR(191) NOT NULL,
-    `description` VARCHAR(191) NOT NULL,
-
-    PRIMARY KEY (`id`)
-) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
-
 -- CreateTable
 CREATE TABLE `Objects` (
     `id` VARCHAR(191) NOT NULL,
-    `objectGroupId` INTEGER NOT NULL,
     `name` VARCHAR(191) NOT NULL,
     `origin_x` INTEGER NOT NULL DEFAULT 0,
     `origin_y` INTEGER NOT NULL DEFAULT 0,
@@ -107,9 +97,6 @@ CREATE TABLE `Chat` (
     PRIMARY KEY (`id`)
 ) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
 
--- AddForeignKey
-ALTER TABLE `Objects` ADD CONSTRAINT `Objects_objectGroupId_fkey` FOREIGN KEY (`objectGroupId`) REFERENCES `ObjectGroup`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;
-
 -- AddForeignKey
 ALTER TABLE `Character` ADD CONSTRAINT `Character_userId_fkey` FOREIGN KEY (`userId`) REFERENCES `User`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;
 
diff --git a/src/app/events/gm/GmTileList.ts b/src/app/events/gm/GmTileList.ts
index 2c91d7a..c806aa4 100644
--- a/src/app/events/gm/GmTileList.ts
+++ b/src/app/events/gm/GmTileList.ts
@@ -14,6 +14,11 @@ interface IPayload {
 export default function (socket: TSocket, io: Server) {
     socket.on('gm:tile:list', async (data: any, callback: (response: string[]) => void) => {
 
+        if (socket.character?.role !== 'gm') {
+            console.log(`---Character #${socket.character?.id} is not a game master.`);
+            return;
+        }
+
         // get root path
         const folder = path.join(process.cwd(), 'public', 'tiles');
 
diff --git a/src/app/events/gm/GmTileRemove.ts b/src/app/events/gm/GmTileRemove.ts
new file mode 100644
index 0000000..4ca7988
--- /dev/null
+++ b/src/app/events/gm/GmTileRemove.ts
@@ -0,0 +1,39 @@
+import { Server } from "socket.io";
+import {TSocket} from "../../utilities/Types";
+import {writeFile} from "node:fs";
+import {randomUUID} from "node:crypto";
+import path from "path";
+import fs from "fs";
+
+interface IPayload {
+    tile: string;
+}
+
+/**
+ * Handle game master remove tile event
+ * @param socket
+ * @param io
+ */
+export default function (socket: TSocket, io: Server) {
+    socket.on('gm:tile:remove', async (data: IPayload, callback: (response: boolean) => void) => {
+
+        if (socket.character?.role !== 'gm') {
+            return;
+        }
+
+        // get root path
+        const public_folder = path.join(process.cwd(), 'public', 'tiles');
+        
+        // remove the tile from the disk
+        const finalFilePath = path.join(public_folder, data.tile);
+        fs.unlink(finalFilePath, (err) => {
+            if (err) {
+                console.log(err);
+                callback(false);
+                return;
+            }
+
+            callback(true);
+        });
+    });
+}
\ No newline at end of file
diff --git a/src/app/events/gm/GmTileUpload.ts b/src/app/events/gm/GmTileUpload.ts
index 1894e40..34c1372 100644
--- a/src/app/events/gm/GmTileUpload.ts
+++ b/src/app/events/gm/GmTileUpload.ts
@@ -17,7 +17,9 @@ interface IPayload {
 export default function (socket: TSocket, io: Server) {
     socket.on('gm:tile:upload', async (data: any, callback: (response: boolean) => void) => {
 
-        // @TODO : check if socket is gm
+        if (socket.character?.role !== 'gm') {
+            return;
+        }
 
         // get root path
         const public_folder = path.join(process.cwd(), 'public', 'tiles');
@@ -28,13 +30,18 @@ export default function (socket: TSocket, io: Server) {
         }
 
         for (const key in data) {
-            const filename = randomUUID();
+            // the files in the folder are named 0.png, 1.png, 2.png etc... check the last file name and add 1
+            const files = fs.readdirSync(public_folder);
+            const lastFile = files[files.length - 1];
+            const lastFileName = lastFile?.split('.')[0];
+            const filename = `${parseInt(lastFileName ?? 0) + 1}.png`;
             const finalFilePath = path.join(public_folder, filename);
             const tile = data[key];
 
             // save the tile to the disk, for example
             writeFile(finalFilePath, tile, (err) => {});
 
+            // return true to the client
             callback(true);
         }
     });
diff --git a/src/app/events/gm/GmZoneEditorZoneRequest.ts b/src/app/events/gm/GmZoneEditorZoneRequest.ts
index 519487d..ea5735d 100644
--- a/src/app/events/gm/GmZoneEditorZoneRequest.ts
+++ b/src/app/events/gm/GmZoneEditorZoneRequest.ts
@@ -15,6 +15,11 @@ interface IPayload {
  */
 export default function (socket: TSocket, io: Server) {
     socket.on('gm:zone_editor:zone:request', async (data: IPayload) => {
+
+        if (socket.character?.role !== 'gm') {
+            return;
+        }
+
         console.log(`---GM ${socket.character?.id} has requested zone via zone editor.`);
 
         if (!data.zoneId) {
diff --git a/src/app/events/gm/GmZoneEditorZoneSave.ts b/src/app/events/gm/GmZoneEditorZoneSave.ts
index c25fbcb..e9515a5 100644
--- a/src/app/events/gm/GmZoneEditorZoneSave.ts
+++ b/src/app/events/gm/GmZoneEditorZoneSave.ts
@@ -20,6 +20,12 @@ interface IPayload {
  */
 export default function (socket: TSocket, io: Server) {
     socket.on('gm:zone_editor:zone:save', async (data: IPayload) => {
+
+        if (socket.character?.role !== 'gm') {
+            console.log(`---Character #${socket.character?.id} is not a game master.`);
+            return;
+        }
+
         console.log(`---GM ${socket.character?.id} has saved zone via zone editor.`);
 
         console.log(data);
diff --git a/src/app/repositories/CharacterRepository.ts b/src/app/repositories/CharacterRepository.ts
index 7aab75c..caa96ed 100644
--- a/src/app/repositories/CharacterRepository.ts
+++ b/src/app/repositories/CharacterRepository.ts
@@ -49,6 +49,7 @@ class CharacterRepository {
                 data: {
                     userId,
                     name,
+                    role: 'gm',
                     position_x: 0,
                     position_y: 0,
                     rotation: 0,
diff --git a/src/app/services/AssetService.ts b/src/app/services/AssetService.ts
new file mode 100644
index 0000000..aafb66b
--- /dev/null
+++ b/src/app/services/AssetService.ts
@@ -0,0 +1,10 @@
+
+class AssetService
+{
+    static generateTileset() {
+        
+    }
+
+}
+
+export default AssetService;
\ No newline at end of file