From 2cf114d2b35b3f3019897637e639a2b0876c2a76 Mon Sep 17 00:00:00 2001
From: Victor Giers <mail@victorgiers.com>
Date: Mon, 27 Apr 2026 17:25:33 +0200
Subject: [PATCH] Improve handling of optional projectDocument when building
 runtime scenes

---
 src/runtime-three/runtime-scene-build.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/runtime-three/runtime-scene-build.ts b/src/runtime-three/runtime-scene-build.ts
index 18f3c498..12590f9f 100644
--- a/src/runtime-three/runtime-scene-build.ts
+++ b/src/runtime-three/runtime-scene-build.ts
@@ -1839,7 +1839,9 @@ export function buildRuntimeSceneFromDocument(
   assertRuntimeSceneBuildable(document, {
     navigationMode,
     loadedModelAssets: options.loadedModelAssets,
-    projectDocument: options.projectDocument
+    ...(options.projectDocument === undefined
+      ? {}
+      : { projectDocument: options.projectDocument })
   });
 
   const enabledBrushes = Object.values(document.brushes).filter(