https://www.awn.com/news/framestore-puts-grave-face-harvey-d...

Tim webber says it was rendered at 4k. Which contradicts what I remember. If he meant 4k textures that would make sense. 4k textures might have been why renderman kept on OOMing though and we had to tile the render even more.

Also I don't know how they printed it back out to film. It might have been sent to hollywood to laser/print out.