zombie84 said:

... As far as I know, the seeker ball was recomped every time, and that would mean the lightsaber was as well, regardless of whether they visually changed it somehow as in this shot.

I'm gonna bet that it will be have to figured out shot by shot and there may not be any consistent technique where the wide shots have a new effect or the close-ups are merely re-mattes, for example.

Would the inconsistencies of the work (for instance the shots where the snow speeder cockpit is translucent and other shots where it is fixed) be attributed by differences in ILM employees assigned to work on the shots?