[sidequestlegend]

When a space URL produces nothing - a DNS failure, a 404 or plain web page that never constructs the SDK scene, or a page that reaches SCENE_READY with zero objects - BSScene now abandons the load and takes the player to a known world instead of leaving them behind the loading cage (or opening it into a void). The fallback world is the combined scene bundle at MISSING_WORLD_ASSET_URL; inside it an interactive BSBrowser opens the address the user typed, with a BSText label above it explaining that the world does not exist so we opened the address in a browser instead.

How it works

• A pure decision (MissingWorldFallback.Evaluate) is polled while a load waits: nothing registered AND (browser/JS failure after a 1 s grace, OR ready-but-empty after the empty-scene grace, OR no SDK scene constructed within MissingWorldTimeoutSeconds). Pages that did construct the scene are never timed out. User cancels are never redirected.
• The fallback reuses the normal load path: LoadUrl became a wrapper over LoadUrlInternal(displayUrl, pageUrl, ...), and LoadMissingWorldFallback navigates the space browser to a small page shipped in this package (Resources/MissingWorld/missing-world.html, served as a base64 data: URL built by MissingWorldPage). Under the SDK JS that Ora injects into every page, that page loads the world.asset, sets the spawn point and creates the label and browser exactly like a real world would, so the cage, networking and spawn placement all behave normally. CurrentUrl keeps the user's URL so the address bar, Rejoin and history still show it.
• BSPipe ignores loadFailed with ERR_ABORTED (-3): Ora forwards did-fail-load for any code, and -3 is what a page still loading reports when the next LoadUrl interrupts it. Cancelling the newer load on that was also a latent bug for portals and mid-load joins.
• BSLink.LoadUrl takes an abort predicate so a page that never reaches SCENE_READY cannot park the load body forever.
• The data URL carries a #OraDefault/ fragment so OraView's own error-page redirect guard leaves the fallback page alone.
• A superseded LoadUrl body no longer fires OnUnitySceneLoad for the URL it lost to (pre-existing latent bug).
• New BSSceneEvents.OnMissingWorldFallback(originalUrl) and public IsFallbackWorld / FallbackOriginalUrl / Registered*Count for app code.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Essentials

Run ID: 15d9d62e-4ea0-4a21-b79c-f340cf7f83f3

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

_{Comment @coderabbitai help to get the list of available commands.}