diff --git a/packages/frontend-misskey-world-engine/src/room/envs/simple.ts b/packages/frontend-misskey-world-engine/src/room/envs/simple.ts
index d7a41f725f..bdec8f45e8 100644
--- a/packages/frontend-misskey-world-engine/src/room/envs/simple.ts
+++ b/packages/frontend-misskey-world-engine/src/room/envs/simple.ts
@@ -261,6 +261,8 @@ export class SimpleEnvManager extends EnvManager<SimpleEnvOptions> {
 
 				if (texPath != null) {
 					const tex = new BABYLON.Texture(texPath, this.engine.scene, false, false);
+					tex.wrapU = BABYLON.Texture.WRAP_ADDRESSMODE;
+					tex.wrapV = BABYLON.Texture.WRAP_ADDRESSMODE;
 					targetMaterial.albedoTexture = tex;
 				} else {
 					targetMaterial.albedoTexture = null;
diff --git a/packages/frontend/assets/room/envs/simple/300.glb b/packages/frontend/assets/room/envs/simple/300.glb
index 2aa5b8a52f..f157cac65a 100644
Binary files a/packages/frontend/assets/room/envs/simple/300.glb and b/packages/frontend/assets/room/envs/simple/300.glb differ
diff --git a/packages/frontend/assets/room/envs/simple/simple.blend b/packages/frontend/assets/room/envs/simple/simple.blend
index 5f6ad4cd32..58b94ab3dd 100644
Binary files a/packages/frontend/assets/room/envs/simple/simple.blend and b/packages/frontend/assets/room/envs/simple/simple.blend differ
diff --git a/packages/frontend/src/pages/rooms/room.simple-env-options.vue b/packages/frontend/src/pages/rooms/room.simple-env-options.vue
index d4bb57df05..542e41d3f2 100644
--- a/packages/frontend/src/pages/rooms/room.simple-env-options.vue
+++ b/packages/frontend/src/pages/rooms/room.simple-env-options.vue
@@ -6,6 +6,15 @@ SPDX-License-Identifier: AGPL-3.0-only
 <template>
 <div :class="$style.root">
 	<div class="_gaps">
+		<MkSelect
+			:items="[
+				{ label: '腰高窓', value: 'kosidakamado' },
+				{ label: '出窓', value: 'demado' },
+			]" :modelValue="options.window" @update:modelValue="v => { update({ window: v }); }"
+		>
+			<template #label>window</template>
+		</MkSelect>
+
 		<MkFolder>
 			<template #label>Walls</template>