Sometimes I use guide geometry to help with the layout of a scene, especially useful when building for real-life locations.

It would be great if Lens Studio had the option to right-click a SceneObject and "Enable Guide", giving that object a little icon and making sure it is excluded when publishing. No assets on that SceneObject would count towards lens size, and they would be treated as if they were deleted if they were accidentally referenced by code.
This would make it easier to have assets in a project purely for reference!

(Inspired by After Effects' Guide layers which are not rendered.)