From 83f322a7e0493e1114f3fd4b2a8bb5849b3f423a Mon Sep 17 00:00:00 2001
From: Amr Khamis <101368138+AmrKhamis1@users.noreply.github.com>
Date: Sat, 14 Mar 2026 23:02:09 +0200
Subject: [PATCH] Add forceMonoscopic option for WebXR

---
 src/renderers/webxr/WebXRManager.js | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/renderers/webxr/WebXRManager.js b/src/renderers/webxr/WebXRManager.js
index 03ed5ab7e7426b..0d84de98c446d8 100644
--- a/src/renderers/webxr/WebXRManager.js
+++ b/src/renderers/webxr/WebXRManager.js
@@ -111,6 +111,15 @@ class WebXRManager extends EventDispatcher {
 		 */
 		this.isPresenting = false;
 
+		/**
+		 * When `true`, both eyes use the left eye's view position. Useful for content
+		 * that must be viewed from a single viewpoint (e.g. 360° panoramas, Matterport-style).
+		 *
+		 * @type {boolean}
+		 * @default false
+		 */
+		this.forceMonoscopic = false;
+
 		/**
 		 * Returns a group representing the `target ray` space of the XR controller.
 		 * Use this space for visualizing 3D objects that support the user in pointing
@@ -982,6 +991,13 @@ class WebXRManager extends EventDispatcher {
 
 					camera.matrix.fromArray( view.transform.matrix );
 					camera.matrix.decompose( camera.position, camera.quaternion, camera.scale );
+					if ( scope.forceMonoscopic && i === 1 && cameras[ 0 ] !== undefined ) {
+
+						camera.position.copy( cameras[ 0 ].position );
+						camera.matrix.compose( camera.position, camera.quaternion, camera.scale );
+
+					}
+
 					camera.projectionMatrix.fromArray( view.projectionMatrix );
 					camera.projectionMatrixInverse.copy( camera.projectionMatrix ).invert();
 					camera.viewport.set( viewport.x, viewport.y, viewport.width, viewport.height );