How to make the noise more large grained?

[Alex_M]

EDIT: An update to my question. I found that I can achieve a similar result to Adv with a slight gaussian blur filter in Photoshop. I automated this with a script so I can batch process lots of images quickly. Original message below:

I notice that the noise from RT CUDA is very fine no matter how large I set the image filter size. Even with a size of 5.0 (VrayLanczosFilter) it's very fine. It almost seems that RT applies the image filter only to the object edges and not on the noise in the image. Can I make the noise appear larger grained like in Adv?

In this screenshot you can see a comparison between Vray Adv and RT CUDA. In both the Image Filter is VrayLanczosFilter and the size is 5.0. As you can see, the noise in the RT render is much finer.

[radoslav.platikanov]

We have two different filtering methods in V-Ray. On CPU we switch between them based on memory consumption, but on GPU only one of them is supported, at least for now. Both methods should produce the same results given enough samples, but as the image shows, the one that works only on CPU is smoother with small number of samples.

[Alex_M]

Great explanation, thanks!