A five-year-old girl filmed as she was repeatedly molested and raped by a man over a period of six months was so traumatised she could not sleep in her own bedroom.
Andrew Clive Willmot, 52, sexually abused the girl more than 100 times and later told police he forgot what he did when he was using methylamphetamine.
His sexual offending was only discovered when police arrested him for possessing drug paraphernalia and also seized devices containing hundreds of child exploitation images and videos in February last year.
Willmot pleaded guilty to persistently engaging in sexual conduct with a child and producing child exploitation material between 2016 and 2017, and possessing child pornography.
He was sentenced in the WA District Court this week to 13-and-a-half years in prison.
Judge Alan Troy described Willmot's crimes against the girl as "brazen in the extreme", as well as calculated and a breach of trust.
He said the offending was significantly aggravated by the recordings that preserved the "appalling violation" of the girl.
"You would have caused this child significant physical pain, but you continued to offend against her time and time again to satisfy your need for sexual gratification, which in the circumstances can only be described as depraved," he said.
In a victim impact statement, the girl's mother said the child was so traumatised she could not sleep in her own bedroom or sit on the furniture in the house.
The girl has since moved to another state, the court heard.
Judge Troy rejected Willmot's claim he had "no particular memory" of what happened.
"There may be periods when you would suffer memory loss because of your heavy drug use but, in my view, there is absolutely no way that you have lost a memory of repeatedly sexually offending against a five-year-old child in a manner that you clearly did on possibly more than 100 occasions," he said.
"Rather, the position I'm quite satisfied is that you cannot bear to recall what it is you did and it is more palatable for you to say that you just do not remember it."
Willmot must serve at least 11-and-a-half years behind bars before he can be eligible for parole.