Change active material output node?

Hi forum,

I’m just getting started with material nodes. Together with PyNodes material nodes are very powerful. I would like to try different combinations and test-render each of them. Is there a way to change the active output node or is this strictly the first output node only and I have to ‘rewire’ my material nodes to the first output node?

Also, I’m trying to get my head around some PyNode material scripts. I quite like the Freestyle render and PyNode stripes effect as in this video by T.K. . I (more or less) understand the Freestyle scripts - at least to the extend that I can adjust them - but I don’t know where to start with the PyNode script for a striped material like that. Does anyone have a sample script and would be willing to share it or a link to a tutorial for these kind of effects? I couldn’t find much online.