You're right, Frank. But C4D's & VRay are the fastest around I think, not fair to compare them to Vue!  What i find funny about Vue's radiosity engine is that you can up the quality very high with custom photon mapping and gathering, and it won't take much longer to render than the default settings, only preparation times take longer, because this process is not multithreaded. So I hope for Vue7 that radiosity and caustics preparation times will be fully multithreaded and take advantage of multicore CPUs.