Adywan, would you still be willing to consider having the lightsabers glow for ROTJ:R?
I don’t think you realize how difficult it is to create a new light source and not have it look fake. The thing with the new movies is that they had LED light sabers on set that actually lit the actors and scene IRL. That just wasn’t possible back in the 70-80s so there is no lighting reference.
Although it would be cool and you might be able to use a red or blue or green filter to get close to that affect, I don’t believe it would hold up. Lighting is such a tricky area in VFX because, your eyes are so used to seeing real lighting that they can easily tell something is fake if anything is even slightly off.
Check out Corridor crew redoing the shot from Scorpion King. They mention how you do it using the extraction tool. I’ve used the same technique in some shots. You can change the color and blend it.
https://www.youtube.com/watch?v=KH1V6CHO1Jk. Watch around the 4.55 min mark. You can flip what he’s doing and add color to the shadow area too if you want.