Vray-Progressive Path Tracing

Another rendering method that can use in Vray is called Progressive Path Tracing, it is using the light cache as calculation, each passes calculate the whole frame, so the rendering can be stopped anytime you want. Similar to Kerkythea MTL and Maxwell, the images is going better when more passes are calculated. As an result, the speed is always the problem if u want a clear image.  I know the advantages of this is the simple settings, no need to tweak the parameters like Irradiance Map does to get the right light distribution. Maybe its not a good exmaple to test the interior view with this method, but I haven't really found out the real value of using it. I think the IM+LC works much better and faster.