Found the post below and had some thoughts that warranted a new thread. It would seem that the deflector dish in TMP has at least three modes: not-illuminated when in drydock, orange when main drive systems not engaged, blue when at impulse/warp. The directors cut tried to fix some shots to fit this system, but made others not consistent. Supposedly Probert had said that it gets bluer and maybe even eventually whiter as power goes up. So then, why after TMP, and the parts of TWOK that re-use that footage, do the Enterprise and Enterprise-A never show onscreen with a deflector color other than blue? What do people think? Both in-universe and real-world answers from anyone with info would be welcome.