diff --git a/app.js b/app.js
index b43dcaf..4d40503 100644
--- a/app.js
+++ b/app.js
@@ -32,6 +32,7 @@ document.addEventListener('DOMContentLoaded', function () {
     const afSelect = document.querySelector('select[name="Anisotropic"]');
     const afGroup = afSelect.closest('.form-group');
     const rendererSelect = document.getElementById('renderer-select');
+    const hdTextures = document.getElementById('check-hd-textures');
 
     // --- Sound Toggle ---
     function updateSoundEmojiState() {
@@ -207,6 +208,12 @@ document.addEventListener('DOMContentLoaded', function () {
                 }
             }
 
+            if (hdTextures) {
+                iniContent += "[extensions]\n";
+                value = hdTextures.checked ? 'YES' : 'NO';
+                iniContent += `${hdTextures.name}=${value}\n`;
+            }
+
             const workerCode = `
                         self.onmessage = async (e) => {
                             if (e.data.action === 'save') {
@@ -458,6 +465,10 @@ document.addEventListener('DOMContentLoaded', function () {
         checkInitialCacheStatus();
     });
 
+    hdTextures.addEventListener('change', () => {
+        checkInitialCacheStatus();
+    });
+
     rendererSelect.addEventListener('change', () => {
         showOrHideGraphicsOptions();
     });
@@ -478,10 +489,10 @@ document.addEventListener('DOMContentLoaded', function () {
 
     function checkInitialCacheStatus() {
         if (navigator.serviceWorker.controller) {
-            const selectedLanguage = languageSelect.value;
             navigator.serviceWorker.controller.postMessage({
                 action: 'check_cache_status',
-                language: selectedLanguage
+                language: languageSelect.value,
+                hdTextures: hdTextures.checked
             });
         }
     }
diff --git a/index.html b/index.html
index 53656a9..a271002 100644
--- a/index.html
+++ b/index.html
@@ -409,6 +409,39 @@
                             </div>
                         </div>
                     </div>
+                    <div class="config-section">
+                        <h3 class="config-legend">
+                            Extensions
+                            <span class="tooltip-trigger">?
+                                <span class="tooltip-content">
+                                    Expands the game with new content and modifications created by the community.
+                                </span>
+                            </span>
+                        </h3>
+                        <div class="form-grid">
+                            <div class="form-group">
+                                <label class="form-group-label">
+                                    Options
+                                    <span class="tooltip-trigger">?
+                                        <span class="tooltip-content">
+                                            <strong>HD Textures:</strong> Enhance the game's visuals with
+                                            high-definition textures. An extra 25MB download is
+                                            required when this is enabled.
+                                        </span>
+                                    </span>
+                                </label>
+                                <div class="checkbox-group option-list">
+                                    <div class="option-item">
+                                        <input type="checkbox" id="check-hd-textures" name="Texture Loader"
+                                            data-not-ini="true">
+                                        <label for="check-hd-textures">
+                                            HD Textures
+                                        </label>
+                                    </div>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
                     <div class="config-section">
                         <h3 class="config-legend">Offline Play</h3>
                         <div class="offline-play-grid">
diff --git a/sw.js b/sw.js
index e75f384..51f28d3 100644
--- a/sw.js
+++ b/sw.js
@@ -31,6 +31,24 @@ const gameFiles = [
     "/LEGO/Scripts/Race/JETRACER.SI", "/LEGO/data/WORLD.WDB"
 ];
 
+const textureFiles = [
+    "/LEGO/textures/beach.gif.bmp", "/LEGO/textures/doctor.gif.bmp", "/LEGO/textures/infochst.gif.bmp",
+    "/LEGO/textures/o.gif.bmp", "/LEGO/textures/relrel01.gif.bmp", "/LEGO/textures/rockx.gif.bmp",
+    "/LEGO/textures/water2x.gif.bmp", "/LEGO/textures/bowtie.gif.bmp", "/LEGO/textures/e.gif.bmp",
+    "/LEGO/textures/jfrnt.gif.bmp", "/LEGO/textures/papachst.gif.bmp", "/LEGO/textures/road1way.gif.bmp",
+    "/LEGO/textures/sandredx.gif.bmp", "/LEGO/textures/w_curve.gif.bmp", "/LEGO/textures/brela_01.gif.bmp",
+    "/LEGO/textures/flowers.gif.bmp", "/LEGO/textures/l6.gif.bmp", "/LEGO/textures/pebblesx.gif.bmp",
+    "/LEGO/textures/road3wa2.gif.bmp", "/LEGO/textures/se_curve.gif.bmp", "/LEGO/textures/wnbars.gif.bmp",
+    "/LEGO/textures/bth1chst.gif.bmp", "/LEGO/textures/fruit.gif.bmp", "/LEGO/textures/l.gif.bmp",
+    "/LEGO/textures/pizcurve.gif.bmp", "/LEGO/textures/road3wa3.gif.bmp", "/LEGO/textures/shftchst.gif.bmp",
+    "/LEGO/textures/bth2chst.gif.bmp", "/LEGO/textures/gasroad.gif.bmp", "/LEGO/textures/mamachst.gif.bmp",
+    "/LEGO/textures/polbar01.gif.bmp", "/LEGO/textures/road3way.gif.bmp", "/LEGO/textures/tightcrv.gif.bmp",
+    "/LEGO/textures/cheker01.gif.bmp", "/LEGO/textures/g.gif.bmp", "/LEGO/textures/mech.gif.bmp",
+    "/LEGO/textures/polkadot.gif.bmp", "/LEGO/textures/road4way.gif.bmp", "/LEGO/textures/unkchst.gif.bmp",
+    "/LEGO/textures/construct.gif.bmp", "/LEGO/textures/grassx.gif.bmp", "/LEGO/textures/nwcurve.gif.bmp",
+    "/LEGO/textures/redskul.gif.bmp", "/LEGO/textures/roadstr8.gif.bmp", "/LEGO/textures/vest.gif.bmp"
+];
+
 const STATIC_CACHE_NAME = 'static-assets-v1';
 
 const rangeRequestsPlugin = new RangeRequestsPlugin();
@@ -82,12 +100,16 @@ async function uninstallLanguagePack(language, client) {
     }
 }
 
-async function checkCacheStatus(language, client) {
+async function checkCacheStatus(language, hdTextures, client) {
     const cacheName = getLanguageCacheName(language);
     const cache = await caches.open(cacheName);
     const requests = await cache.keys();
     const cachedUrls = requests.map(req => new URL(req.url).pathname);
-    const missingFiles = gameFiles.filter(file => !cachedUrls.includes(file));
+    let requiredFiles = gameFiles;
+    if (hdTextures) {
+        requiredFiles = requiredFiles.concat(textureFiles);
+    }
+    const missingFiles = requiredFiles.filter(file => !cachedUrls.includes(file));
 
     client.postMessage({
         action: 'cache_status',
@@ -140,7 +162,7 @@ self.addEventListener('message', (event) => {
                 uninstallLanguagePack(event.data.language, event.source);
                 break;
             case 'check_cache_status':
-                checkCacheStatus(event.data.language, event.source);
+                checkCacheStatus(event.data.language, event.data.hdTextures, event.source);
                 break;
         }
     }