This video is very good but it proves a point about the different blending edges that are too obvious because we have real life explosions and artificial ones.
What bugs me most is ,appart some mask errors, when the lightsaber flashes appear when vader advances on Luke(we see luke's back) but its an easy task to be fixed,is the edge blending.
When you are using a mask to substract the edge(futhered or not) seems wahshed out. What it needs to be is to get the original feel when an overexposured light burns the edges of a dark object.
In the case of this video and most of the new effects that added(mostly glows and flashes) are too clean to simulate the feel and the proper burning
This example below might give an idea of what i mean.
Original
Simple mask
Better edges.
Do you see the difference as a more accurate film feel?
Not the best example of saving the washed out edge arround Luke's head still you might get a taste.
The inbetween edges between the glow and the obsured object must contain color and edge effects.
It has to have the edge like it was printed and burned the pixels not just substracting the object. :)
-Angel