From e86952b46988b4ca718e891c45fd1db4352c4402 Mon Sep 17 00:00:00 2001
From: work <840004959@qq.com>
Date: Tue, 18 Nov 2025 09:30:21 +0000
Subject: [PATCH 1/2] fix(multi-client): Prevent duplicate lights when multiple
 clients connect

---
 gz3d/src/gzscene.js | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/gz3d/src/gzscene.js b/gz3d/src/gzscene.js
index a0ca5dff..dd619e7c 100644
--- a/gz3d/src/gzscene.js
+++ b/gz3d/src/gzscene.js
@@ -335,12 +335,14 @@ GZ3D.Scene.prototype.initScene = function()
 {
   this.emitter.emit('show_grid', 'show');
 
-  // create a sun light
-  var obj = this.createLight(3, new THREE.Color(0.8, 0.8, 0.8), 0.9,
-       {position: {x:0, y:0, z:10}, orientation: {x:0, y:0, z:0, w:1}},
-       null, true, 'sun', {x: 0.5, y: 0.1, z: -0.9});
-
-  this.add(obj);
+  var existingSun = this.getByName('sun');
+  if (!existingSun) {
+    // create a sun light
+    var obj = this.createLight(3, new THREE.Color(0.8, 0.8, 0.8), 0.9,
+         {position: {x:0, y:0, z:10}, orientation: {x:0, y:0, z:0, w:1}},
+         null, true, 'sun', {x: 0.5, y: 0.1, z: -0.9});
+    this.add(obj);
+  }
 };
 
 GZ3D.Scene.prototype.setSDFParser = function(sdfParser)

From 191bd42ea701f4f25bd30c594dcb813100285650 Mon Sep 17 00:00:00 2001
From: work <840004959@qq.com>
Date: Tue, 18 Nov 2025 09:33:31 +0000
Subject: [PATCH 2/2] fix(multi-client): Prevent duplicate lights when multiple
 clients connect

---
 gz3d/src/gzscene.js | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/gz3d/src/gzscene.js b/gz3d/src/gzscene.js
index dd619e7c..b22d0fa8 100644
--- a/gz3d/src/gzscene.js
+++ b/gz3d/src/gzscene.js
@@ -332,9 +332,8 @@ GZ3D.Scene.prototype.init = function()
 };
 
 GZ3D.Scene.prototype.initScene = function()
-{
+{ 
   this.emitter.emit('show_grid', 'show');
-
   var existingSun = this.getByName('sun');
   if (!existingSun) {
     // create a sun light