Yeah, I understood it had to do with the animation element obviously but I was a little bit unsure by how exactly it came out that way, it all sounds like a good explanation for what we're seeing.
TServo2049 said:
Yes, notice that the color of the bright edge garbage is basically the same color as the saber glow. That's why I think it was burned in with the glow itself.
Yes, if you look more closely at the 2nd frame I posted, you can clearly see that there's actual saber glow animation visible at the top not just a bright edge.