Apparently it was re-rendered at 2K for the original 2010 Blu-ray release, so this is probably an upscale based on the same master.Highly unlikely. That data is ancient, so unless Pixar have kept it up to date over the past few decades it will be totally incompatible with modern Renderman setups.
From what I understand re-rendering in something like toy story which doesn't have that much detail by today's standards is pretty straight forward time wise. You aren't adding anything new being the crucial bit.While I can't say it's impossible, just feels like they would have made a selling point of it in the marketing if they had done that.
He BELIEVES he is an actual Space Ranger, but as a Toy, he cannot help but freeze - because, Toy / Plot ScienceOne thing I've never understood, Buzz doesn't believe he's a toy and thinks he's an actual space ranger, so why does he freeze like any other toy when a human is around?