diff --git a/components/calc/models.vue b/components/calc/models.vue
index 6d34d93..4192dbe 100644
--- a/components/calc/models.vue
+++ b/components/calc/models.vue
@@ -3,6 +3,9 @@ import { TresCanvas } from '@tresjs/core'
 import { Stats, OrbitControls } from '@tresjs/cientos'
 import { degToRad } from 'three/src/math/MathUtils.js';
 
+const container = ref<HTMLElement | null>(null);
+const { isIntersecting, startObserver, stopObserver } = useSceneVisibility();
+
 const controlsState = reactive({
     position: { x: 0, y: 0, z: 0 },
     enablePan: false,
@@ -17,9 +20,21 @@ const cameraStat = reactive({
     aspect: 1920 / 600,
     // fov: 40,
 })
+const renderMode = computed(() => (isIntersecting.value ? 'always' : 'manual'));
+
+onMounted(async () => {
+    if (container.value) {
+        await nextTick()
+        startObserver(container.value);
+    }
+});
+
+onBeforeUnmount(() => {
+    stopObserver();
+});
 </script>
 <template>
-    <div class="calc">
+    <div class="calc" ref="container">
         <ClientOnly fallback-tag="div">
             <template #fallback>
                 <div class="fallback">
@@ -27,9 +42,12 @@ const cameraStat = reactive({
                 </div>
             </template>
             <Loader />
-            <Scene :canvasProps="{ clearColor: '#e2e8f0' }">
+            <TresCanvas clear-color="#e2e8f0" :render-mode="renderMode" :key="renderMode">
                 <TresPerspectiveCamera v-bind="cameraStat" ref="camera" />
                 <OrbitControls v-bind="controlsState" make-default />
+                <Suspense>
+                    <ModelEnv />
+                </Suspense>
                 <Suspense>
                     <ModelSmoothCamera />
                 </Suspense>
@@ -38,7 +56,7 @@ const cameraStat = reactive({
                         <ModelParametric />
                     </Suspense>
                 </TresGroup>
-            </Scene>
+            </TresCanvas>
         </ClientOnly>
     </div>
 </template>
\ No newline at end of file
diff --git a/components/expDiagram.vue b/components/expDiagram.vue
index e303764..59e4c55 100644
--- a/components/expDiagram.vue
+++ b/components/expDiagram.vue
@@ -3,6 +3,9 @@ import { TresCanvas } from '@tresjs/core'
 import { OrbitControls } from '@tresjs/cientos'
 import { Vector3 } from 'three';
 
+const container = ref<HTMLElement | null>(null);
+const { isIntersecting, startObserver, stopObserver } = useSceneVisibility();
+
 const camera = ref()
 const controls = ref()
 const controlsState = reactive({
@@ -25,36 +28,56 @@ const changeDistance = (v = 1) => {
         camera.value.position.normalize().multiplyScalar(r)
     }
 }
+
+const renderMode = computed(() => (isIntersecting.value ? 'always' : 'manual'));
+
+onMounted(async () => {
+    if (container.value) {
+        await nextTick()
+        startObserver(container.value);
+    }
+});
+
+onBeforeUnmount(() => {
+    stopObserver();
+});
 </script>
 <template>
-    <div class="h-96 relative">
-        <ClientOnly fallback-tag="div">
-            <template #fallback>
-                <div class="fallback">
-                    Загрузка 3D модели
-                </div>
-            </template>
-            <Scene :canvasProps="{ height: '600' }">
-                <TresPerspectiveCamera :position="[-7, 2, 4]" ref="camera" />
-                <OrbitControls v-bind="controlsState" ref="controls" make-default />
-                <ModelDiagram />
-            </Scene>
-        </ClientOnly>
-        <div class="canvas-icons">
-            <a href="#" @click.prevent="toggleExpState">
-                <Icon name="mdi:arrow-collapse-horizontal" v-if="explosion_state" />
-                <Icon name="mdi:arrow-expand-horizontal" v-else />
-            </a>
-            <a href="#" @click.prevent="changeDistance(-0.5)"
-                :class="[{ 'disabled': camera ? (camera.position.distanceTo(new Vector3(0, 0, 0)) <= controlsState.minDistance) : null }]">
-                <Icon name="mdi:plus-circle-outline" />
-            </a>
-            <a href="#" @click.prevent="changeDistance(0.5)"
-                :class="[{ 'disabled': camera ? (camera.position.distanceTo(new Vector3(0, 0, 0)) >= (controlsState.maxDistance)) : null }]">
-                <Icon name="mdi:minus-circle-outline" />
-            </a>
+    <Suspense>
+        <div ref="container" class="h-96 relative">
+            <ClientOnly fallback-tag="div">
+                <template #fallback>
+                    <div class="fallback">
+                        Загрузка 3D модели
+                    </div>
+                </template>
+                <TresCanvas height="600" :render-mode="renderMode" :key="renderMode">
+                    <TresPerspectiveCamera :position="[-7, 2, 4]" ref="camera" />
+                    <OrbitControls v-bind="controlsState" ref="controls" make-default />
+                    <Suspense>
+                        <ModelEnv />
+                    </Suspense>
+                    <Suspense>
+                        <ModelDiagram />
+                    </Suspense>
+                </TresCanvas>
+            </ClientOnly>
+            <div class="canvas-icons">
+                <a href="#" @click.prevent="toggleExpState">
+                    <Icon name="mdi:arrow-collapse-horizontal" v-if="explosion_state" />
+                    <Icon name="mdi:arrow-expand-horizontal" v-else />
+                </a>
+                <a href="#" @click.prevent="changeDistance(-0.5)"
+                    :class="[{ 'disabled': camera ? (camera.position.distanceTo(new Vector3(0, 0, 0)) <= controlsState.minDistance) : null }]">
+                    <Icon name="mdi:plus-circle-outline" />
+                </a>
+                <a href="#" @click.prevent="changeDistance(0.5)"
+                    :class="[{ 'disabled': camera ? (camera.position.distanceTo(new Vector3(0, 0, 0)) >= (controlsState.maxDistance)) : null }]">
+                    <Icon name="mdi:minus-circle-outline" />
+                </a>
+            </div>
         </div>
-    </div>
+    </Suspense>
 </template>
 
 <style scoped>
diff --git a/components/model/env.vue b/components/model/env.vue
index cba9fc1..9a47ec2 100644
--- a/components/model/env.vue
+++ b/components/model/env.vue
@@ -8,7 +8,7 @@ import {
 import { GainMapLoader, } from '@monogrid/gainmap-js'
 import { useLoop } from '@tresjs/core';
 const { scene, renderer, camera } = useTresContext()
-const {onBeforeRender} = useLoop()
+const { onBeforeRender } = useLoop()
 
 renderer.value.toneMapping = CineonToneMapping
 renderer.value.toneMappingExposure = 1
@@ -18,6 +18,7 @@ renderer.value.shadowMap.type = PCFSoftShadowMap
 
 const pmremGenerator = new PMREMGenerator(renderer.value);
 pmremGenerator.compileEquirectangularShader();
+
 onMounted(async () => {
     const loader = new GainMapLoader(renderer.value)
     const result = await loader.loadAsync([
@@ -35,14 +36,15 @@ onMounted(async () => {
     scene.value.environmentIntensity = 1.25
     scene.value.environmentRotation.z = 0.25
     result.renderTarget.texture.dispose();
-})
-onBeforeRender(()=>{
-    if(camera.value) {
-        const cameraDirection = new Vector3()
-        camera.value.getWorldDirection(cameraDirection);
-        const angle = Math.atan2(cameraDirection.z, cameraDirection.x);
-        scene.value.environmentRotation.z = angle + 0.25
-    }
+
+    onBeforeRender(() => {
+        if (camera.value) {
+            const cameraDirection = new Vector3()
+            camera.value.getWorldDirection(cameraDirection);
+            const angle = Math.atan2(cameraDirection.z, cameraDirection.x);
+            scene.value.environmentRotation.z = angle + 0.25
+        }
+    })
 })
 </script>
 <template></template>
\ No newline at end of file
diff --git a/composables/useSceneVisibility.ts b/composables/useSceneVisibility.ts
new file mode 100644
index 0000000..5dd4f7d
--- /dev/null
+++ b/composables/useSceneVisibility.ts
@@ -0,0 +1,57 @@
+// useSceneVisibility.ts
+import { ref, onMounted, onBeforeUnmount } from 'vue';
+
+export function useSceneVisibility() {
+    const isIntersecting = ref(false); // Состояние видимости
+    let observer: IntersectionObserver | null = null;
+    let debounceTimeout: ReturnType<typeof setTimeout> | null = null;
+
+    const startObserver = (element: HTMLElement) => {
+        observer = new IntersectionObserver(
+            (entries) => {
+                entries.forEach((entry) => {
+                    if (debounceTimeout) {
+                        clearTimeout(debounceTimeout); // Очищаем предыдущий таймер
+                    }
+
+                    // Устанавливаем новый таймер
+                    debounceTimeout = setTimeout(() => {
+                        isIntersecting.value = entry.isIntersecting;
+                    }, 100); // Задержка в 300 мс
+                });
+            },
+            { threshold: 0.05 } // Порог видимости
+        );
+
+        if (element) {
+            observer.observe(element);
+        }
+    };
+
+    const stopObserver = () => {
+        if (observer) {
+            observer.disconnect();
+            observer = null;
+        }
+
+        if (debounceTimeout) {
+            clearTimeout(debounceTimeout); // Очищаем таймер при остановке наблюдателя
+            debounceTimeout = null;
+        }
+    };
+
+    onMounted(() => {
+        // Инициализация наблюдателя при монтировании
+    });
+
+    onBeforeUnmount(() => {
+        // Очистка наблюдателя при размонтировании
+        stopObserver();
+    });
+
+    return {
+        isIntersecting,
+        startObserver,
+        stopObserver,
+    };
+}
\ No newline at end of file
diff --git a/nuxt.config.ts b/nuxt.config.ts
index 888f306..9cf5d8c 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -51,9 +51,9 @@ export default defineNuxtConfig({
   vite: {
     assetsInclude: ['**/*.glb', '**/*.gltf'],
     build: {
-      target: 'esnext'
+      target: 'esnext',
       // minify: 'esbuild'
-      // minify: false
+      minify: false,
     },
   },
   robots: {
diff --git a/pages/index.vue b/pages/index.vue
index f1683a2..3d560fd 100644
--- a/pages/index.vue
+++ b/pages/index.vue
@@ -133,7 +133,9 @@ watch(openTab, () => {
             </div>
             <div class="container gap-4">
                 <div class="col-span-full xl:col-span-8">
-                    <ExpDiagram />
+                    <Suspense>
+                        <ExpDiagram />
+                    </Suspense>
                 </div>
                 <div class="col-span-full xl:col-span-4 prose">
                     <span v-html="advantagesText"></span>