"For instance, John Wallace, one of the men featured in the painting, lost his home after a relationship ended, according to the Church of Scotland," the Post's report said. "He has been coming to the Glasgow City Mission regularly for over four years."
The painting represents hope just as it highlights Glasgow's homeless population.
The community there "really feels" what's going on in Glasgow with poverty and food banks. The people prove generous, which the painting represents, the Post quoted Campbell as saying.
The Rev. Alastair Duncan, minister of the church where Campbell is artist-in-residence, explained what the 13 men in "Our Last Supper" require for improved circumstances, Sam Haysom wrote for Mashable.
"The people who Glasgow City Mission supports may be in hostel accommodation, may have their own place or may be genuinely homeless, but they are people who in some ways have been vulnerable or are finding a way out of that," Duncan said, Mashable reported. "They just need that consistency of care and support for them whatever stage they are in."