Before proceeding, you must verify that the scene export works correctly. This is done using the Umbra Debugger tool, which is designed to help you get accustomed to how Umbra 3 works and how to get results quickly. You can find the tool in the bin folder in the release package (umbra3\bin\win64\umbradebugger64.exe).
When you first launch the Debugger, it will open the Umbra house demo scene. You can use this scene to test the computation as well, but if you wish to use your own exported scene instead import it as depicted in the picture on below.
Next, you need to verify that your scene looks correct. Fly around in the scene make sure that everything looks right.