30-year-old Gavin Williams had spent 15 years in and out of custody, culminating in being incarcerated at HMP Parc in July 2010.
Despite his claims to never having picked up a paintbrush before his time in jail, the Invisible Walls project helped him nurture a talent for art.
His murals became a distinctive feature on the walls of the prison, and after his release, Gavin started his own painting business.
"My eyes have now been opened to the damage coming to places like that do to families" he says.
"Having that guilt has made me more determined to be more successful in my life and not to go back to the same place".
More top news
Drizzle gives way to more substantial rain which will push in to western areas during the second half of tonight!
Geraint 'Busker' Jones, from Llandysul, has been entertaining the crowds since the 1960s.
Wales will not bid for the 2026 Commonwealth Games. Ken Skates said the Welsh Government had concluded it is not in a position to do so.