ElumTools saves renderings for all calculated boundaries (Rooms, Regions, etc) in the Revit project file. They can be easily reopened in ElumTools Calculation Viewer using the View Renderings or Rendering Manager commands from the main toolbar. When clicking on the View Renderings button, simply select any previously calculated boundary. If a rendering exists, the Calculation Viewer will open with the saved rendered environment. If ElumTools cannot find a valid rendering a message similar to the follow will be displayed.
Note: You can disable ElumTools ability to save renderings from the master ElumTools Settings.
Note: Saved raytraced renderings are stored independent of the Revit project file as graphic images (PNG, JPG, BMP).