SHADOW FILE
A shadow file contains optimized shadows for static objects in a map. Generating optimized shadows is a complicated process and it takes some time (up to several minutes) to complete. The engine generates a shadow file automatically while loading a map when visualization is started. This file is generated only when it is not present or if it is older than a compiled map. While this file is being generated, the visualization loading progress bar runs again from start and information about this process is being displayed.