 One goal for sight-size students is to gain enough skill to transfer an accurate image to the paper or canvas without the aid of a mechanical device.Contemporary realist painter Adrian Gottlieb notes that "while professional painters pursuing a full-time career will develop an 'eye' that precludes the need for measuring devices and plumb lines (tools necessary during the training period), the observation method itself is not abandoned - instead it becomes second nature.Sight-size can be taught and applied in conjunction with a particular sensitivity to gesture to create life-like imagery; especially when applied to portraiture and figurative works."