I inherited a file from KeyShot. The textures come in as node-based PBR's. They work at first but then somehow the links get broken and they all go black. In the end, I want to convert them to Arnold anyway. I can't seem to figure out how to do this. I've tried baking the textures out, but that doesn't work (everything writes out black). Is there a workflow for translating node-based C4d materials to Arnold shaders?
You can try Arnold > Utilities > Materials > Convert Selected C4D Material to Arnold Material, that works for the PBR and Standard material. But if you mean the Node Material, there's no conversion exists for them.