Late to the party here. Have these year old complaints/concerns about Odyssey lighting been addressed by FDev staff? I was trying to do some Detailed Surface Scanning in Odyssey tonight and in scan mode, the target planet is almost as dark as the background "space". When switching view to the backside of the planet, the areas covered by a probe impact are initially visible but do not remain so. Ultimately, scanning the planet and trying to tell what surface areas you've already covered is nearly impossible. Makes it a little tough to gain an efficiency bonus especially mapping a gas giant requiring 20+ probes. No such problem in Horizons.
It seems the problem I am having with DSS in Odyssey harks back to the same "everything is too dark" observation that started this particular thread. I did try to look for some on-line commentary specific to DSS being too dark in Odyssey but did not find anything. This thread seemed at least somewhat related.