Milky Way Processing Feedback

There shouldn’t be a big difference between a grey card and a white card. The problem is, that they are tools helping to get a neutral light setting but they are far away from a rule. That’s why I mentioned the sunset setting:

On a sunset, there is a warm orange light which floods the scenery. So the grey (or white) of a grey card doesn’t look like neutral grey anymore. If you now use this card for WB everything gets a loot cooler look than it was in reality, because you suppose the warm lit card is the neutral reference. So using a grey card when you have a quite neutral lighting is a good idea. But using it in special light situations doesn’t give you automatically the correct WB. When the light itself isn’t neutral this has to be taken into account.