> For the complete documentation index, see [llms.txt](https://docs.echo3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.echo3d.com/facear/troubleshooting.md).

# Troubleshooting

## Know Issues

Our team is actively investigating the following issues:

* A 3D asset sometimes appears as a black box on iOS.

## I can't see the 3D asset!

### Are you pointing to the right target?

Make sure to point your phone to a face.

### Is your asset too small/big?

It might be the case that your 3D asset is too small or too big to appear in the camera view.

Scale the model by adding a metadata key named `scale` to the 3D models. See how to add metadata in the [Data Page](/web-console/manage-pages/data-page/how-to-add-data.md#1-adding-a-data-entry-1) section of the documentation.

Now **rescan the QR code** to rebuild and refresh your FaceAR app.

## I am getting some other error.

Let's talk! Ask on [Slack](https://go.echo3D.co/join) or send an email to <support@echo3D.com> and please attach a screenshot of the error you are experiencing.