Oneplus accidentally pushed an over-the-air update that disables a filter that can see through some thin black plastics and, in certain cases, clothes.

Oneplus said on May 19 that it would temporarily disable the filter in the Chinese version of its operating system. The recent update removed the filter for people outside of China anyway.

The filter creates an x-ray-like effect by using the infrared sensors built into the OnePlus 8 Pro to capture light that’s not visible to the human eye. The feature was intended to be used to create interesting-looking photos but came under scrutiny when people realized that it could sometimes see through clothing.

You can get a good look at how the filter can see through a thin black T-shirt in a video by Unbox therapy. The video was taken from a video shared by Ben geskin on Twitter.

The Verge also experimented with the feature. It was found that it works on very thin black plastic that’s already a little see-through in the right light.

A user on OnePlus’ forums reported seeing similar update notes. Android Police installed the update, and confirmed that the photochrom filter had been removed.