I’d really love a definitive answer on what exact resolution the VFX/DI for AotC and RotS were done at.

We know they were shot at 1920:817 (cropped down from the 1920:1080 of the 16:9 sensor), but it’s not 100% clear what happened next.

2k scope is like 2048:856, so I suppose it’s possible that the live-action footage was upscaled very slightly and then the cgi and final color timing was done natively at that resolution.

But I suppose it’s also possible ILM actually worked at 1920:817, matching the live-action material pixel for pixel.

So, yeah, it would be nice to get clarification on this. But I’m not sure who would even be the person to ask.

The Lowry “restoration” of the OT done for the dvd in 2004 (and reused, with some tweaks, for the blu-ray) was only done at 1920:1080 (actually 1920:817 since it’s scope), not 2k, and there’ve been actual dcp’s made from them. On the other hand, George clearly didn’t consider it the finished master of the OT since he eventually commissioned the RMW 4k job.

The vfx (and eventual rebuild) of TPM would’ve almost certainly been true 2k scope (2048:856) since it was already the late 90’s and TPM was shot on film with a very large budget.

It’s worth noting that many of the releases on the new 4k format have been 2k upscales, even many of the 4k releases of movies made within the last couple years. There’s also been at least one live-action movie released on 4k that was shot at 1080p just like AotC/RotS (Resident Evil: Afterlife).