The phrase "canvas surface" refers to the top layer or outer part of a canvas, which is a type of strong and durable fabric. It is the part of the canvas that is typically used for painting or drawing. Full definition
The two - dimensional canvas surface is made to appear three - dimensional. (religion-online.org)
Her signature graffiti - like markings, often bright flashes of neon, are here executed in quick, curved black outlines that penetrate through faux pixels, atop a bare canvas surface. (artsy.net)
In other words, the space is generated within the acknowledged limits of the two - dimensional canvas surface. (encyclopedia.com)