With a strong interest in Eastern ink painting and calligraphy, Nelson's success in combining his passion with technical know-how in Computer Graphics is evident. He now works on Expresii, an advanced digital painting system currently focusing on Eastern ink painting and calligraphy. In doing so, he wishes to revitalize and further develop the ancient art forms in the modern age.
Nelson's journey in digital art started when he was a teenager. Paint systems at that time could not meet the needs for organic strokes – the brushes were often a blob or some pixel-sized strings. Nelson started working on brush simulation at HKUST in 1999 and since then has been making several milestones. In 2005, he presented a paper on MoXi (a predecessor of Expresii) at SIGGRAPH, the world's most influential conference in Computer Graphics, and wowed the professionals. Adobe Systems Inc immediately reached out and licensed MoXi in 2006.
In 2008, he joined Microsoft in Seattle developing another breakthrough app that simulates Western paint media before coming back to Asia in 2011. He started building Expresii in 2012 and in 2017, Expresii became an app partner of Microsoft Surface.