# 4. New Layer app

- [4.1. Overview](/unisphere-whitepaper/4.-new-layer-app/4.1.-overview.md)
- [4.2. 3D models](/unisphere-whitepaper/4.-new-layer-app/4.2.-3d-models.md)
- [4.2.1. Smart objects](/unisphere-whitepaper/4.-new-layer-app/4.2.1.-smart-objects.md)
- [4.3. 3D catalog](/unisphere-whitepaper/4.-new-layer-app/4.3.-3d-catalog.md)
- [4.4. Attachments](/unisphere-whitepaper/4.-new-layer-app/4.4.-attachments.md)
- [4.5. Map](/unisphere-whitepaper/4.-new-layer-app/4.5.-map.md)
- [4.6. Registration](/unisphere-whitepaper/4.-new-layer-app/4.6.-registration.md)
- [4.7. Public objects](/unisphere-whitepaper/4.-new-layer-app/4.7.-public-objects.md)
- [4.8. Premium subscription](/unisphere-whitepaper/4.-new-layer-app/4.8.-premium-subscription.md)