The top left laser is not screened, and presents a unrealistic red glow which any beam of light or energy source does not deflect light unless it was a physical object. (We are talking about energy. )
The other examples are lasers transferred in screen mode. In this mode I feel the lasers are accurately presented realistically. A good example of this is if you watch a thunderstorm lightning does not have that glow you see at night if it happened in the middle of the bright day.
The Laser drawn directly over the Walker is in screen mode and since the background is darker then a bright sky or snow, it presents for of the glow based on background lighting conditions.
As far as roto scoping the sabers, I was limited to scoping on top of what was already there, so it sometimes will screw up the actual transfer of the glow effect or look a little to thick. There is only so much you can do with this. Original laser blasts can be removed, but light sabers are next impossible because of all the movement. I think the only way you could remove original light sabers is to roto out the actual actors, and do a background replacement, and have to have "clean plates" for ever freaking frame. something which I am not willing to do because of the ridicules time involved for this.
