Animated movies, like those from the famed Japanese filmmaker Hayao Miyazaki, are not made in a hurry. The intricate hand drawings and attention paid to every single detail can make for a slow, potentially yearslong process.

Or, you could simply ask ChatGPT to turn any old photo into a facsimile of Mr. Miyazaki’s work in just a few seconds.

Many people did precisely that this week after OpenAI released an update to ChatGPT on Tuesday that improved its image-generation technology. Now, a user who asks the platform to render an image in the style of Studio Ghibli could be shown a picture that would not look out of place in the films “My Neighbor Totoro” or “Spirited Away.”

On social media, users quickly began posting Ghibli-style images. They ranged from selfies and family photos to memes. Some used ChatGPT’s new feature to create renderings of violent or dark images, like the World Trade Center towers falling on Sept. 11 and the murder of George Floyd.

Sam Altman, OpenAI’s chief executive, changed his profile picture on X to a Ghiblified image of himself and posted a joke about the filter’s sudden popularity and how it had overtaken his previous, seemingly more important work.

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