As far as I can tell, Pixar only started using GPUs for previsualization around 2013 or 2014. It looks like Renderman didn't have real GPU super until 2018. Th

As far as I can tell, Pixar only started using GPUs for previsualization around 2013 or 2014. It looks like Renderman didn't have real GPU super until 2018. They've never actually confirmed moving from CPUs to GPUs rendering for their final production renders. So, yeah, I think you're on to something.