The lighting window

Hi
So when you start a new scene realtime computed gi and baked gi start computing i always just stop them.Do they ever stop computing and if so what exactly do they do?.Should i be letting them run?

So it finally stopped computing I don’t see anything new what does it do ?

If you do not need any dynamic or statoic GI you can just disable the compuation in the Lighting Window.
For more information about Global illumination / the Lighting Window you can find here: