Ten years ago, musician Usman Riaz grabbed a pencil and started to sketch. He might have hoped, but didn't know at the time, that it would start him on a path to making history. That initial drawing became The Glassworker - Pakistan's first ever hand-drawn animated feature film.

It follows the story of young Vincent and his father Tomas, who run a glass workshop, and a war that threatens to upend their lives. Vincent's relationship with violinist Alliz, the daughter of a military colonel, begins to test the bond between father and son. Usman tells BBC Asian Network the characters ultimately come to learn "that life is beautiful but fragile, like glass”.

He describes The Glassworker as an "anti-war film" set in an ambiguous and fantastical world that takes inspiration from his home country. “I wanted to tackle issues and themes that would have been difficult to tackle if it was based in Pakistan," he says. The country doesn't have the thriving film industry of neighbouring India and there is no government support or incentive for budding creatives like Usman.

So The Glassworker was a passion project, he says. “These 10 years for me have just been purely driven with passion and obsession. “Since I was a child, I have loved hand-drawn animation and there's something so magical about it.

"The beauty of the lines drawn and painted by the human hand always resonated with me.” Usman says he travelled the world looking for mentors and his search took him to Japanese animati.