I’ve seen it. Unfortunately it’s not quite well done enough to implement into the film itself since it’s clear that the saber is composed of still images tracked over the original. I’m not entirely sure how I’d hope to improve on that with my own mediocre skills, however.
Why not put a CGI version of Luke’s saber hilt onto Anakin’s saber?
Well yeah, that’s the idea, but VFX is hard and I have very little experience with it. My AE skills go exactly this far. There’s a 3D model of the saber in Battlefront, and it wouldn’t be difficult to get it into Blender or something, but then the trick is making sure your virtual camera has the same focal length as the original shots, painstakingly animating the hilt in 3D space to match Anakin’s, and attempting to light the saber correctly. There’s a reason that ImmersionVFX went the route of just warping still images - much more straightforward and only marginally less convincing. You could get away with leaving Anakin’s hilt in some shots, since it’s known to show up when it shouldn’t anyway.
