Calum’s artworks explore technology as a form of artistic expression. The computer graphics within his works have a dual function, both as the subject and medium. In formulating the computer graphics, Calum used the Microsoft Paint application tool on a computer and drawing tablet.  

Calum’s artwork is influenced from a wide range of media. Calum identifies Piet Mondrian’s paintings (especially the early ones) as having a great impact on his art practice. Calum is also influenced by the electronic music of Brian Eno, the band Yello and U2’s album Zooropa.