By default, users under the age of 16 will now be blocked from going live and opening images containing suspected nudity. To lift these restrictions, teens will need to get parental approval.

But the cutesy images didn't last long. By Wednesday night, the system started to block some users' requests for images in the style of Ghibli and some — though not all — other artists.

The company’s chatbot can now create elaborate and unusual images. By Cade Metz Reporting from San Francisco Chatbots were originally designed to chat. But they can generate images, too.