Perhaps stating the obvious here, but Studio does have a toon-style shader built in. I don't recall exactly where as I've customized my layout UI quite a bit, but in the standard UI when you go to hit 'render' in Studio 4, the pop-up box that has some values for normal also has a drop down tile where you can select 'Cartoon'. Studio 3 had this as well, slightly different orientation. I'm sure its more easily accessible under Render Settings in the Render tab.

The same can be done quite easily in post, as RorrKonn mentioned. I've never used those particular programs, but Gimp has a plethora of toon and comic book effects that are pretty easy to make what you want.

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