Mr Ovenden, of Mount, Bodmin, faces nine charges of indecency with a child and indecent assault.
BBC: Graham Ovenden sex abuse trial: Mother says 'I was coward'
The court heard the woman was content for her daughter to be photographed by Mr Ovenden.
BBC: Graham Ovenden sex abuse trial: Mother says 'I was coward'
The mother used to visit Mr Ovenden's estate in north Cornwall with her daughter.
BBC: Graham Ovenden sex abuse trial: Mother says 'I was coward'
The Ovenden prints include work inspired by Alice In Wonderland and images of naked young girls.
Referencing English poet William Blake, Ovenden described the "state of grace" as "a thing of wondrous beauty".
BBC: Graham Ovenden child sex abuse trial: Nakedness 'no shame'
During the artist's trial, the jury heard Ovenden's portraiture formed part of a ruse for abusing girls.
Mr Ovenden, 70, denies indecency offences involving four girls, then aged six to 14, dating back 40 years.
BBC: Graham Ovenden sex abuse trial: Mother says 'I was coward'
Ovenden was convicted on six counts of indecency and one of indecent assault.
Ovenden was described in court by prosecutor Ramsay Quaife as "a paedophile" who abused children while they modelled for him.
Judge Graham Cottle released Ovenden on bail and adjourned sentencing for a date to be fixed at Plymouth Crown Court.
The roles of Depp and Winslet will be filled on stage by Foyle's War star Julian Ovenden and Rosalie Craig.
Graham Ovenden denied the charges, which dated back about 40 years and were said to have occurred in London and Cornwall.
Prints by the artist Graham Ovenden have been removed from the Tate's online collection following his conviction for child sex offences.
Ovenden, of The Garage, Barley Splatt, near Bodmin Moor in Cornwall, was not present in court, having been taken ill last week.
Mr Quaife told the court that during police interviews after his arrest in 2008, Mr Ovenden described himself as "a distinguished artist".
Ovenden, 70, is on bail ahead of sentencing at Plymouth Crown Court.
She said she initially ignored her then teenage daughter's allegations of what had happened when Mr Ovenden took her picture as a little girl.
BBC: Graham Ovenden sex abuse trial: Mother says 'I was coward'
Mr Ovenden had been described in court by prosecutor Ramsay Quaife as "a paedophile", who abused children under the ruse of producing their portraits.
Graham Ovenden, 70 - who has had work hung at the Tate Gallery - is accused of sexually abusing children in London and Cornwall.
Charges were filed after formal complaints were made to police in the late 2000s and prosecutor Ramsay Quaife successfully argued Ovenden had abused his victims.
Mr Ovenden said "Christian guilt complex" was responsible for the addition of fig leaves in artwork from the 17th Century on, to prevent completely naked pictures.
BBC: Graham Ovenden child sex abuse trial: Nakedness 'no shame'
Ovenden was found guilty at Truro Crown Court on Tuesday of six counts of indecency and one of indecent assault against girls in the 1970s and 80s.
When giving evidence, Ovenden said there was a "witch-hunt" against those who produce work involving naked children and he accused police of "falsifying" images recovered from his home computer.
When he was arrested over the alleged abuse of one of the girls, Mr Ovenden admitted he had taken photographs of her - a few of them being "nudies", the court was told.
Ovenden, of The Garage in Barley Splatt, near Bodmin Moor in Cornwall, told the court he had taken pictures of children, including those in various states of undress, but said they were not indecent.
Now having been found guilty on the majority of charges, Ovenden has gone from the founder of a noted artistic movement to being a convicted child abuser, facing the prospect of his place among prominent British painters being removed altogether.
In 1975 he founded the artistic movement the Brotherhood of Ruralists - artists who had left the city to live in the countryside - with then-wife Annie Ovenden, as well as fellow artists Jann Haworth, Graham Arnold, David Inshaw, and pop artist Sir Peter Blake.
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