A shop worker who preyed on 11 young girls online called himself "your worst nightmare".
Cameron Stevens targeted the children both here and America from his then home in Pollok. This included the twisted 23-year-old threatening to "leak" a photo of one victim unless she continued to agree to his sick demands.
Stevens now faces jail after he pled guilty to a total of 14 sex offence charges.
They mainly consisted of him communicating with underage girls online and getting them to carry out indecent acts.
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Stevens had his bail continued at the High Court in Glasgow pending sentencing in September. The pervert preyed on the girls - aged between nine and 15 - via social media.
This included the chat app Kik - with an account found on his iPad under the name "Your worst nightmare".
Prosecutor Chris McKenna said: "Stevens contacted females, who were not known to him.
"After establishing a rapport, he incited them to carry out sexual acts (as well) as sending (him) moving and still images.
"He adopted the dominant role and sought to exploit the young females."
He was initially charged in August 2019 after the accessing of indecent images was linked to an address where he lived.
But, a further police probe went on to reveal the scale of his offending.
Mr McKenna said two of the girls were identified and both lived in Scotland.
However, the others are only known by online "usernames" although it is thought they stay in the United States.
Detectives examined the iPad and a mobile phone belonging to Stevens discovering a "large volume of material".
Mr McKenna told the hearing it emerged Stevens had asked victims for "verification photographs" to prove they were actually children.
Files were saved via the Dropbox storage app and another which needed a passcode to access.
Much of what Stevens asked the girls to do is too graphic to explain in detail.
However, he demanded one forward him more photos, but she said she "did not want to carry out his instruction".
Mr McKenna: "He responded by threatening to leak an image she had sent him and saying that he knew how to track and locate people."
Police discovered in total more than 100 indecent photos and video clips.
Edith Forrest, defending, said Stevens had been diagnosed with Tourette's Syndrome and Autism.
He also had no access to the internet or electronic devices since being arrested.
Lady Stacey told Stevens: "You will understand that you have pled guilty to serious charges.
"I am going to call for a (social work) report. In the meantime, you continue to be bound by the special conditions of bail."
Stevens was also put on the sex offenders list.
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