I posted a test of black robe Rey earlier in the thread, which might be the one you’re thinking of. I used EBSynth but it still required a lot of manual masking because the tracking wasn’t great. You can see around her shoulders where I had to mask the original footage back in because EBSynth kept wanting to spread the black to the background as the shot pans (probably would’ve made more sense to start with the ending frame and process it backwards…).
I did try a test of one shot of the end scene using Rotobrush 2.0 instead, but I couldn’t get that to track any better, so it still required me to do a bunch of almost frame-by-frame masking - ultimately I decided it added basically nothing to the film for the time investment and stopped working on it.
Wow, that actually looks excellent.
That said, I can only imagine the time such an endeavor would take so I get it. But if some brave wizard ever decides to one day take up the challenge, I’d forever be in their debt. In the meantime, if it’s only for the one scene, maybe there’s someone out there who would be willing to take the time? No? No one wants to put their whole life aside for this small change? Well, I can dream…