By default it will use one thread less than the amount of cores available, so that the rest of the system is still usable while a render is running.
It's not currently user configurable, but I'll add it to the Todo list. Thanks!
Re:The Tungsten Renderer
by omega_rythm on Tuesday January 13, 2015 @05:13AM
(#8878914)
It makes sense, thanks for the explanation.
So, I just tested your renderer with the material test scene, and while it ran pretty fast, it seems it only used 3 cores out of 4 on my system. Is there a way to configure/force the renderer to run a number of threads?