We've been kicking it around in a few different threads. Hoping to get an authority on this.
There is a way to have multiple shaders on a single model, and it sounds like there is also a way to blend those shaders via some sort of alpha function.
My interest is primarily in combining YAToon with Toon Pro in a single hierarchy and blending the two.
Being unable to blend the two in Carrara means an entire global shader as YAToon and an entire global shader as Toon Pro and then uploading each shader individually, doing two complete renders, and then blending them in AE.
While blending in Carrara wouldn't provide the same functionality as does AE's blending options, I think the saved step might be worth it. And if not, I'd at least like to be able to see the results for comparison.