Learn about the Fast/Full Global Illumination raytracing settings in VRED.
Video captions: Open Render Settings and select the Raytracing Quality tab. Select Full Global Illumination mode from the Interactive menu. Activate Raytracing in the toolbar. In the Full Global Illumination mode, the complete scene will be calculated. Here you can find specular reflections, glossy reflections, refractions, direct shadow cast, and indirect lighting. Open the Material Editor and select the default environment to switch it to Is Visible. If you now hide the surrounding geometry, there will be no basic lighting in your scene. Use Full Global Illumination for best quality results.