4 of us did this very big mural wall at basement 2 of Centrepoint. The artwork was laser printed on the big metal panels, a successful experiment at that time. Not etched, not vinyl sheet.
Also featured on URA
https://www.facebook.com/URASingapore/photos/a.379211635472902/1840097402717644/
and here
https://www.facebook.com/photo?fbid=10207318012089372&set=pcb.10207318041610110
https://www.facebook.com/photo/?fbid=10161102679160244&set=a.10159827011880244
https://www.facebook.com/photo/?fbid=10161102679435244&set=a.10159827011880244
This year, I have a plan to explore with another building material.