This isn't really related to WhiteMagic per se, but do you still have the French Pyramid laserdisc? I ask because there are two different versions of the sentry watching the X-wings take off - one of them has an extra layer of clouds superimposed over the gas-giant planet, and one doesn't.
The version with clouds appeared on all of the pre-THX NTSC video releases, but the French and German widescreen laserdiscs may have used a different IP (since they had to drop in the unsubtitled Greedo scene from a grossly inferior film source). So I am curious as to what the shot looks like on these French/German widescreen LDs.