At least for actual Magic cards, it’s not just a matter of consistency in some abstract sense. Cards from the same set need to relate to each other in very precise ways and the related constraints are much more subtle than “please keep the same style”.
Here you can find some examples of real art descriptions that got used for real cards (just google “site:magic.wizards.com art descriptions” for more examples). I could describe further constraints that are implicit in those already long descriptions. For example, consider the Cult Guildmage in the fourth image. When the art description lists “Guild: Rakdos”, it’s implicitly asking for giving the whole card a black-red tone, and possibly inserting the guild logo somewhere in the picture (the guild logo looks like this; note how the guildmage wears one).
I don’t want to dispute that AI-generated artworks are very cheap and can be absolutely stunning, but I still predict that AI as available today would make a terrible job if used to replace human illustrators for Magic cards (You could have a better time using AI artworks for a brand-new trading card game, however).
At least for actual Magic cards, it’s not just a matter of consistency in some abstract sense. Cards from the same set need to relate to each other in very precise ways and the related constraints are much more subtle than “please keep the same style”.
Here you can find some examples of real art descriptions that got used for real cards (just google “site:magic.wizards.com art descriptions” for more examples). I could describe further constraints that are implicit in those already long descriptions. For example, consider the Cult Guildmage in the fourth image. When the art description lists “Guild: Rakdos”, it’s implicitly asking for giving the whole card a black-red tone, and possibly inserting the guild logo somewhere in the picture (the guild logo looks like this; note how the guildmage wears one).
I don’t want to dispute that AI-generated artworks are very cheap and can be absolutely stunning, but I still predict that AI as available today would make a terrible job if used to replace human illustrators for Magic cards (You could have a better time using AI artworks for a brand-new trading card game, however).