Your app builds fine but the Reality Composer Pro scene never appears. Here's how to diagnose and fix the most common causes, from package links to entity name mismatches.
The classic symptom is a build that succeeds and an app that runs, but the 3D content simply is not there. No crash, no red error, just an empty space.
This pattern almost always points to one of a small set of causes: the package is not properly linked, the entity name is wrong, the load failed silently, or the content is present but out of view.
Because there is no crash, the temptation is to assume the scene is broken. Usually it is not; the connection between code and content is.
Work through the causes below in order. Each is quick to check, and one of them is very likely responsible.
RealityKit can only load content from a bundle that is actually part of your app. If the Reality Composer Pro package is not linked to your target, the load will never find anything.
Open your project settings and confirm the package appears under your app target's dependencies. If it is missing, add it and rebuild.
This is especially common after moving files, renaming folders, or cloning a repository on a new machine where the local package path no longer resolves.
A clean build after fixing the link matters. Stale build products can mask whether the fix took effect, so build fresh and test again.
RealityKit loads entities by name, and those names are case-sensitive. A single typo means the load quietly returns nothing.
Open the project in Reality Composer Pro and read the exact name of the scene or entity you are loading. Compare it character by character with the string in your code.
Watch for subtle differences: trailing spaces, capitalization, or an entity nested one level deeper than you expected. Any of these breaks the lookup.
The fix is simply to align the names. To prevent recurrence, adopt stable naming conventions and consider centralizing name strings so they are defined in one place rather than scattered through the code.
Asynchronous loads can fail without stopping the app if you do not handle errors. A swallowed error looks identical to an empty scene.
Add explicit error handling around your load. Log the failure with enough context to tell whether the bundle was missing, the name was wrong, or the asset itself could not be read.
Run the app and read the console. A clear error message usually turns a mysterious empty view into an obvious, fixable problem.
Make this handling permanent. Robust logging around content loading pays for itself every time an asset gets renamed or a package path shifts during development.
Sometimes the scene loads perfectly and is simply out of view. The most common reason is scale, because RealityKit works in meters.
A model authored in centimeters can be a hundred times too large, filling the space so completely that nothing reads as an object, or so small it is a speck. Verify and correct the real-world scale.
Positioning and anchoring are the other culprits. Content placed behind the user, far away, or anchored to something that is not present will be effectively invisible.
To test, temporarily place the content directly in front of the viewpoint at a known scale. If it appears, you have isolated the issue to transform or anchoring rather than loading.
Because Reality Composer Pro ships with Xcode and evolves alongside RealityKit and visionOS, following an outdated tutorial can lead you to call APIs that behave differently.
Confirm the loading APIs you use against the current official documentation. An initializer or loading call from an older release may not match your installed toolchain.
Also make sure everyone on the team is on compatible tooling. A package authored in a newer version opened by an older Xcode can produce confusing results.
When in doubt, reduce to the simplest documented loading path, get that working, and only then layer your customizations back on.
Occasionally the load itself is fine, but the code runs at the wrong moment or adds the entity to the wrong place.
Because loading is asynchronous, a result can arrive after a view has changed state. If you add the entity to content that is no longer on screen, it will never appear even though the load succeeded.
Confirm that you add loaded content to the active view's content, and that you are not accidentally replacing or clearing it elsewhere in the same update.
A quick way to test this is to log at both the moment loading completes and the moment you add the entity. If the completion fires but the add never runs, or runs against stale state, you have found a lifecycle problem rather than a loading one.
It also helps to keep loading tied to a stable point in the view's lifecycle rather than to a transient event that may fire more than once. Loading in a predictable place, and guarding against adding the same entity twice, removes a whole category of confusing intermittent failures.
Start at the package: is it linked to your app target, and does the project build cleanly? If not, fix that first.
Next, verify names character by character between Reality Composer Pro and your code. This resolves a large share of cases on its own.
Then add error handling and read the console, so any real load failure announces itself instead of hiding.
Finally, rule out visibility by forcing a known scale and position in front of the user. Working through these four checks in order will surface the cause almost every time.
If the scene still refuses to appear, strip the problem down. Load a single, simple entity into a minimal RealityView and confirm that works in isolation.
A minimal reproduction separates content problems from integration problems. If the simple case works, reintroduce complexity until it breaks, and you have found the culprit.
Remember the boundaries of the tooling while debugging. Reality Composer Pro composes content; it does not build or ship the app, so a loading bug lives in your Xcode project and code, not in a failure to submit.
And keep the official documentation open. Matching your approach to the current, verified APIs is the fastest way out of a stubborn loading problem.
Check that the Reality Composer Pro package is linked to your app target and the project builds cleanly, then verify entity names match exactly between the tool and your code. Those two causes cover most cases.
Asynchronous loads can fail silently if you don't handle errors. Add explicit error handling and logging around the load so failures appear in the console instead of looking like an empty scene.
It's usually scale, position, or anchoring. RealityKit works in meters, so a mis-scaled model can be far too large or small. Temporarily force a known scale and place it directly in front of the viewpoint to confirm.
Yes. Reality Composer Pro and RealityKit evolve alongside Xcode and visionOS. Verify your loading APIs against current official documentation rather than older code snippets.
Build a minimal reproduction: load one simple entity into a bare RealityView. If that works, reintroduce complexity until it breaks to find the culprit.