"It was more challenging than most, usually when I'm painting I listen to music or podcasts but I couldn't do anything like that with this one, this was a lot more sombre," he said.
The words "Remember the heroes" is written to the right of Rashid including the date 15.3.2019 when the mosque attacks took place.
Paul X Walsh said the work, at a site commonly known as the Avondale Art Park at 1925 Great North Rd, would likely be gone in a month.
The mural was created to show those who lost their lives in the attack will not be forgotten and he told the Herald he'd like to create a more permanent version.
"This is a temporary sort of spot and I'd imagine it would probably be gone in a month or so, that's the nature of that site.
"But yeah, I would like to do a permanent version if I could somewhere."