diff --git a/src/document/migrate-scene-document.ts b/src/document/migrate-scene-document.ts
index 096fe186..3152c188 100644
--- a/src/document/migrate-scene-document.ts
+++ b/src/document/migrate-scene-document.ts
@@ -2567,6 +2567,12 @@ function readWorldBackgroundSettings(
     };
   }
 
+  if (backgroundMode === "shader") {
+    return {
+      mode: "shader"
+    };
+  }
+
   return {
     mode: "image",
     assetId: expectString(value.assetId, `${label}.assetId`),