Ben Pickering was sentenced to six years in jail in 2014 after admitting his part in a £5m fraud.
During the scam, Pickering and three others made 30 false mortgage applications against properties in South Wales to a number of lenders including the Leeds Building Society, according to WalesOnline.
After the loans defaulted, the group tried to buy back the properties at lowered prices.
Pickering served half the jail time and was released at the end of 2017.
He told WalesOnline: “I have now served my time and I am not looking over my shoulder – it is a huge relief.
“You have to learn from your mistakes.”
Pickering, who directed and produced the film, said his thriller Welcome to Curiosity encourages people to ask themselves about the moral judgements they make.
It stars Eastenders actor Richard Blackwood, as well as Lock, Stock and Two Smoking Barrels’ Stephen Marcus and Game of Thrones’ Amrita Acharia.
Pickering said he was motivated to commit fraud by financial reasons linked to his family.
But added: “Your family are the innocent victims of your crime and that is something I cannot forgive myself for. I will spend my life making it up to them.”