diff --git a/packages/frontend/assets/room/objects/mi-plate-displayed/mi-plate-displayed.blend b/packages/frontend/assets/room/objects/mi-plate-displayed/mi-plate-displayed.blend
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index 0000000000..f4fdfcd423
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diff --git a/packages/frontend/assets/room/objects/mi-plate-displayed/mi-plate-displayed.glb b/packages/frontend/assets/room/objects/mi-plate-displayed/mi-plate-displayed.glb
new file mode 100644
index 0000000000..3837254c56
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diff --git a/packages/frontend/assets/room/objects/mi-plate/mi-plate.blend b/packages/frontend/assets/room/objects/mi-plate/mi-plate.blend
new file mode 100644
index 0000000000..0527507c6e
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diff --git a/packages/frontend/assets/room/objects/mi-plate/mi-plate.glb b/packages/frontend/assets/room/objects/mi-plate/mi-plate.glb
new file mode 100644
index 0000000000..ab6fccb060
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diff --git a/packages/frontend/src/utility/room/engine.ts b/packages/frontend/src/utility/room/engine.ts
index 04910cebe7..a0ca854754 100644
--- a/packages/frontend/src/utility/room/engine.ts
+++ b/packages/frontend/src/utility/room/engine.ts
@@ -1694,6 +1694,7 @@ export class RoomObjectPreviewEngine {
 
 		this.envMapIndoor = BABYLON.CubeTexture.CreateFromPrefilteredData('/client-assets/room/indoor.env', this.scene);
 		this.envMapIndoor.boundingBoxSize = new BABYLON.Vector3(500/*cm*/, 500/*cm*/, 500/*cm*/);
+		this.envMapIndoor.level = 0.25;
 
 		this.camera = new BABYLON.ArcRotateCamera('camera', -Math.PI / 2, Math.PI / 2.5, 300/*cm*/, new BABYLON.Vector3(0, 90/*cm*/, 0), this.scene);
 		this.camera.attachControl(this.canvas);
diff --git a/packages/frontend/src/utility/room/objects/miPlate.ts b/packages/frontend/src/utility/room/objects/miPlate.ts
new file mode 100644
index 0000000000..c92b420e0f
--- /dev/null
+++ b/packages/frontend/src/utility/room/objects/miPlate.ts
@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineObject } from '../engine.js';
+
+export const miPlate = defineObject({
+	id: 'miPlate',
+	name: 'Mi Plate',
+	options: {
+		schema: {},
+		default: {},
+	},
+	placement: 'top',
+	createInstance: () => {
+		return {
+			interactions: {},
+		};
+	},
+});
diff --git a/packages/frontend/src/utility/room/objects/miPlateDisplayed.ts b/packages/frontend/src/utility/room/objects/miPlateDisplayed.ts
new file mode 100644
index 0000000000..e9780ea7d2
--- /dev/null
+++ b/packages/frontend/src/utility/room/objects/miPlateDisplayed.ts
@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineObject } from '../engine.js';
+
+export const miPlateDisplayed = defineObject({
+	id: 'miPlateDisplayed',
+	name: 'Mi Plate (Displayed)',
+	options: {
+		schema: {},
+		default: {},
+	},
+	placement: 'top',
+	createInstance: () => {
+		return {
+			interactions: {},
+		};
+	},
+});