Ah that looks good. Where can I buy? @Snarly, would it be possible to have some kind of for loop in this to do multiple renders with different material settings automatically? 

Or even better, could you expose some kind of python access so one can apply a shader with parameters programmatically? Maybe your architecture seperates UI and application core already, so that would not be any significant effort?

snarlyApp.applyShader( fig, matZone, snarly.getShader("gold", bruised=20) )

Usecase is that finetuning a shader is highly manual work, having a python interface for shader configuration could help in automating this process (let poser render many variations while having coffee, and afterwards picking the best settings)