I'm wondering how casting Fizban’s Platinum Shield on a massive creature, such as a Spelljammer Ship or similarly large creature alters the effects of the spell.
You create a field of silvery light that surrounds a creature of your choice within range (you can choose yourself). The field sheds dim light out to 5 feet. While surrounded by the field, a creature gains the following benefits: [...] As a bonus action on subsequent turns, you can move the field to another creature within 60 feet of the field.
The range is 60 feet, so it might be that some of the creature is outside the range of the spell. The partial coverage rule in the DMG does not seem to apply. Would only the area covered by the spell be covered given their size, or does the fact that part of the creature is within range mean the whole thing is?