An artist and former prof at the city’s prestigious School of Visual Arts is stockpiling a “creepy” collection of photos of unwitting straphangers — including scores of tank-top-wearing women.

Brian Appel — who claims to be “Faculty Emeritus” at SVA, which the Manhattan school denies — has been uploading tens of thousands of images to his Facebook account for more than two years.

The trove includes photos of rail-riding couples kidding, friends laughing and straphangers dapperly dressed as they get to their destinations.

Some of the pics include children.

A slew also capture unsuspecting women wearing tight and revealing clothes.

“It’s very creepy! It’s very scary for women,” Brooklyn mom Courtney Fitzpatrick told The Post.

“I was really mad when I saw it,” she said of the collection. “Both of my daughters were on it a year apart from each other. In fact, one was his cover photo — it was a picture of my daughter when she was 16 going to play practice with her friend, who was 14.”

It is not illegal to take pictures of strangers in public spaces, such as the subway, without consent. The faces in Appel’s snaps are not blurred.

Fitzpatrick said she learned about the collection earlier this week when someone alerted a Bay Ridge Facebook group that Appel took most of his pictures on the R train — and posted them online with location and date stamps.

Fitzpatrick said she had a gut feeling she would find her two girls, ages 25 and 18, in Appel’s images and spent hours scouring the collection until she discovered them in separate posts from January 2026 and July 2025, respectively.

One of the daughters was photographed crying on the subway after a bad day, while the other was clearly a minor, the mom noted.

To make matters worse, one of her girls had already experienced a stalker, and Fitzpatrick feared that the picture could reignite the very real concern for her daughter’s safety.

“I was really mad when I saw her,” Fitzpatrick, 51, said of the image.

“Having her picture up there with the train she’s on, and the time, that’s really what I am concerned about. Some weirdo just digging around there and maybe following her. That could happen to any of those girls on there.”

Fitzpatrick asked Appel to remove the picture, noting he responded kindly and took it down. But he continued snapping and posting pictures of other straphangers the very next day.

The Brooklyn mom, who scoured the tens of thousands of pictures in her hunt for her daughters, noticed during her effort that Appel shared many crude photos of women.

“I saw one girl in a low-cut white dress in three different pictures,” she said. “He seems to be taking pictures trying to make them look bad or something. I can’t explain it.”

Appel’s discreet picture-snapping has been going on since at least 2024 but noticeably increased in recent months to up to a dozen pictures per day — catching the attention of straphangers who have since cautioned riders across several social-media platforms.

Many noticed that Appel identified himself as a “Faculty Emeritus at the School of Visual Art in Manhattan” and seized the opportunity to channel their anger at the college and demand they fire the educator.

Appel ended his 15-year employment at SVA in August 2025 and never held emeritus status, the school said.

“Brian Appel is no longer employed by SVA and does not hold emeritus faculty status,” a rep for SVA told The Post.

The artist did not respond to numerous Post requests for comment but has responded to supporters.

“Each one of my photographs is really 2 pictures,” Appel wrote under a July 7 image of a young woman listening to music on the subway.

“The 1st is the way they are posted as half body shots where you get information about their clothes and accessories which will date the images in the future and what you discovered is that when you zoom in on the face you get an intimate look into what’s happening in their head.”