Internal Render Only
Global Illumination (GI) Should be always enabled for optimal results.
The rendering Quality versus Speed can be selected from the drop down list :
Low : Render as fast as possible with a low quality
Medium : Balance between speed and quality
High : Render with Highest quality
GI emissive Background : Enable to have the background contribute to the GI computation
Show GI samples: if enabled the GI samples are plotted on screen while computing GI
