Traditional Western painting, for example, tends to approach the canvas from a single vantage point, painting only what can be seen from that angle and ignoring everything else. Distant objects are diminished, close-up objects are magnified; the Western painter makes every attempt to imbue the flat canvas with a sense of three-dimensionality.
例如傳統西畫多採單一角度的透視法，只畫看得到的景物，在視野外看不到的就舍去；而且遠物縮小、近物放大，力圖在平面上營造三度空間的感覺。