When drawing, everything is not captured as a whole in the manner of a camera. We do not 'see' the whole arranged in every interconnected detail as one complete mass of unified information. Instead, we view what's in front of us and pick up on specific details that capture our attention or that seem salient to the overall impression. We may form an overview and be able to sketch a rough outline as a guide, but in order to proceed it is necessary to work on each individual detail even if we deliberately flit back and forth across the drawing and build up the whole through a skein of accumulating detail. In order to do so we work from impressions towards increasing complexity and our observations record a deepening perception of each detail as it corresponds to the overall scene. Detail doesn't arrive all at once, neither as representation nor as perception but emerges only through scrutiny.