ArcScene and ArcGlobe are specialized 3D viewing applications within ArcGIS 3D Analyst with differing capabilities. ArcScene is optimized for viewing and analysis of smaller datasets in a projected coordinate system, such as a specific study area. ArcGlobe is designed to be used with very large datasets, in both data volume and geographic extent, and displays 3D content on a planetary sphere. It has a sophisticated caching mechanism that indexes and organizes all your data into tiles and levels of detail. Once all the data is loaded, this allows for fast display and visualization as you zoom in and out, pan around, and navigate to different parts of the world.