I don’t think Sketch and Toon can be beat. There are so many options and looks one can achieve. To me that feature set is a major selling point for C4d against competitors.
The one huge drawback is that rendering S&T is glacially slow as it’s not multi-threaded (and of course doesn’t tap into GPU acceleration at all).
The new test version of Octane includes a cel shading option. And I read in passing that Arnold has some sort of Toon or Cel Shader. VRAY has a cel shader–at least in the Max version 3.6. I don’t know if it’s in the C4d version of VRAY…or might be in the future.
I look forward to playing around with the Octane cel shader.
Even more…I hope the c4d v20 release addresses accelerating the native S&T. It’s remarkable…but painful to output.