diff --git a/src/app/components/antiquity/AntiquityViewer.tsx b/src/app/components/antiquity/AntiquityViewer.tsx
index 09f9a85..5217143 100644
--- a/src/app/components/antiquity/AntiquityViewer.tsx
+++ b/src/app/components/antiquity/AntiquityViewer.tsx
@@ -5,6 +5,8 @@ import * as THREE from "three";
 import { OrbitControls } from "three/examples/jsm/controls/OrbitControls.js";
 import { GLTFLoader } from "three/examples/jsm/loaders/GLTFLoader.js";
 import { RoomEnvironment } from "three/examples/jsm/environments/RoomEnvironment.js";
+import { MeshoptDecoder } from "three/examples/jsm/libs/meshopt_decoder.module.js";
+import { createRenderGate } from "@/app/lib/render-gate";
 import { Rotate3d, Pause, Play, Maximize2 } from "lucide-react";
 
 type Status = "loading" | "ready" | "error";
@@ -35,7 +37,7 @@ export function AntiquityViewer({ src }: { src: string }) {
     let disposed = false;
 
     const renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true, powerPreference: "high-performance" });
-    renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2));
+    renderer.setPixelRatio(Math.min(window.devicePixelRatio, 1.5));
     renderer.toneMapping = THREE.ACESFilmicToneMapping;
     renderer.toneMappingExposure = 1.08;
     renderer.domElement.style.cssText = "width:100%;height:100%;display:block;cursor:grab;";
@@ -70,6 +72,18 @@ export function AntiquityViewer({ src }: { src: string }) {
     });
     controlsRef.current = controls;
 
+    let needsRender = true;
+    let active = true;
+    const requestRender = () => {
+      needsRender = true;
+    };
+    controls.addEventListener("change", requestRender);
+
+    const stopGate = createRenderGate(mount, (isActive) => {
+      active = isActive;
+      if (isActive) requestRender();
+    });
+
     const resize = () => {
       const w = mount.clientWidth;
       const h = mount.clientHeight;
@@ -77,12 +91,14 @@ export function AntiquityViewer({ src }: { src: string }) {
       renderer.setSize(w, h, false);
       camera.aspect = w / h;
       camera.updateProjectionMatrix();
+      needsRender = true;
     };
     const observer = new ResizeObserver(resize);
     observer.observe(mount);
     resize();
 
     const loader = new GLTFLoader();
+    loader.setMeshoptDecoder(MeshoptDecoder);
     loader.load(
       src,
       (gltf) => {
@@ -108,6 +124,7 @@ export function AntiquityViewer({ src }: { src: string }) {
 
         homeRef.current = { pos: camera.position.clone(), target: controls.target.clone() };
         setStatus("ready");
+        requestRender();
       },
       (event) => {
         if (event.total) setProgress(Math.round((event.loaded / event.total) * 100));
@@ -118,9 +135,14 @@ export function AntiquityViewer({ src }: { src: string }) {
     );
 
     const tick = () => {
-      controls.update();
-      renderer.render(scene, camera);
       raf = requestAnimationFrame(tick);
+      if (!active) return;
+      // controls.update() trả về true khi camera còn chuyển động (damping/autoRotate)
+      const moving = controls.update();
+      if (needsRender || moving || controls.autoRotate) {
+        renderer.render(scene, camera);
+        needsRender = false;
+      }
     };
     tick();
 
@@ -128,6 +150,8 @@ export function AntiquityViewer({ src }: { src: string }) {
       disposed = true;
       cancelAnimationFrame(raf);
       observer.disconnect();
+      stopGate();
+      controls.removeEventListener("change", requestRender);
       controls.dispose();
       scene.traverse((object) => {
         const mesh = object as THREE.Mesh;