With ArcGIS Pro, you can author and share web scenes to host in ArcGIS Online or Portal for ArcGIS. Web scenes are interactive displays of geographic information that are useful when you need to expose 3D data on the web for visualization and analysis.
You can author your global or local scene with existing web layers or data layers that are published as web layers when you share a web scene. All existing cached layers, including web scene layers, web tile layers, and elevation layers, must be in the coordinate system of the basemap. For more information on basemap and elevation layers, see Basemap and elevation layers.
Both 2D and 3D layers can be published when sharing a web scene. All new web layers will be shared in the projection of your basemap layer. For more information on how different layers are published, see Operational layers.
The illumination and shadow settings saved in the scene properties are maintained through the sharing process. These settings can be modified dynamically in the scene viewer after sharing. Any bookmarks are also included in the web scene.
Local scenes, which can be shared to ArcGIS Online and Portal for ArcGIS 10.4 and later, should be used when you need to use a local projection to maintain the integrity of your data or to reduce distortion. The projection used by the scene must be a well-known, non-custom projection. In a case where you do not have a basemap or elevation source in the projection of your scene, you can omit either.
Global scenes are ideal when sharing data that has a global extent. Although a basemap layer is required with a global scene, an elevation source is not.