The devastating reason Myuran Sukumaran spent his final day furious.

On the day of his execution in April 2015, Myuran Sukumaran was furious.

But it wasn’t his own fate that he was angry about. Instead he was furious about the treatment of the other death row prisoners who were about to face the firing squad with him.

Myuran’s close friend, mentor and Archibald Prize winner Ben Quilty, has told news.com.au that the other inmates, who did not understand Indonesian, had been denied sufficient interpreters by Indonesian authorities.

“Myuran was very angry about this,” he said.

“The guards spoke a bit of broken English but all of the directions were given in Indonesian, and they [prisoners] relied on those people having a translator.”

“Myuran and Andrew were translating Indonesian into English to try to help them understand what was going on,” he added.

Some of the prisoners, who were Iranian, Nigerian, Brazilian and Filipino, had very little understanding of what was happening.

Quilty said this was part of the reason that Sukumaran, Chan, and some of the other Bali Nine were the go-to guys in Kerobokan prison.

“If new inmates came in and they couldn’t speak the language the men would be summoned and they’d help and negotiate their way through, right until the end.”

It’s been less than two years since Sukumaran and Chan were executed by a 13-member firing squad.

On the day of the execution, Sukumaran and Chan, were marched out of the prison with a guard of honour. The other prisoners shook their hands and said goodbye, a testament to the positive impact they had made on the lives of the inmates.

As the two men and the other death row inmates stood in a row, ready to face the firing squad, Sukumaran and Chan led them in singing Bless the Lord O My Soul. They never got to finish the song.

Quilty had met Myuran three years earlier, when he received a note asking him about art technique. They soon formed a close bond. Quilty became his friend and his mentor, and he witnessed first hand Myuran’s development as an artist.

Another Day in Paradise forum series keynote speaker @benquilty surrounded by the powerful portraits painted by Myuran Sukumaran during his incarceration in Bali’s Kerobokan prison, and later on Nusa Kambangan Island

A photo posted by Campbelltown Arts Centre (@campbelltownartscentre) on Jan 13, 2017 at 7:08pm PST

“Myuran became an amazing young artist. Humanity was screaming off the walls,” Quilty told news.com.au.

As a part of the Sydney Festival, Campbelltown Arts Centre is currently showcasing a collection of pieces that Sukumaran created at Kerobokan jail and on Nusa Kambangan Island.

“There’s a lot of people who thought these two young men deserved what was coming for them because they did the crime and therefore they have to do the time, but I challenge anyone to go and see it and come away with this feeling,” Quilty said.

“He really did unpick all of the deep grief, horror and fear he was feeling in the studio.” he added.

*The collection ‘Another Day In Paradise’ is on exhibition at the Campbelltown Arts Centre from January 13 to March 26 as part of the Sydney Festival.