If you would like to change whether the CPU allocation is for Ray Tracing, or Chief Architect, this setting can be controlled in Preferences.
In this article we will be adding a light source to our fireplace to give off a realistic, glowing, fireplace effect for our ray traces.
Follow these steps to try to determine the reason why a scene will not ray trace.
You may experience this message if the Photon Mapping advanced setting is unable to be performed within a Ray Trace rendering.
There are a number of strategies that you can employ to reduce the time required to ray trace without sacrificing the quality of the final image.