Drawing and Observation
Drawing and Observation tests whether you can record what is in front of you - proportion, structure, space, tone and edge - rather than draw a remembered symbol for an object. In 6149, examiners reward evidence of looking: measured relationships, consistent perspective, a controlled value range, and a composition that has been deliberately chosen.
Measure before you commit
Use pencil sighting: hold the pencil at arm's length, close one eye, and compare height to width, angles to vertical/horizontal, and one part to another. A plumb line checks alignment; negative space checks silhouette. Build from the general to the specific - block in the whole before any detail.
Perspective and ellipses
Set the horizon line first. In one-point perspective, receding edges converge to one vanishing point; in two-point, to two. Cylinders need ellipses, not pointed ovals: the ellipse's minor axis aligns with the cylinder's axis, and the opening appears narrower as it approaches eye level. Foreshortening compresses lengths along the line of sight.
Tone, edge and mark
Decide one light source. Separate light, mid-tone, core shadow, reflected light and cast shadow. Use a full value scale (at least five steps) and make hatching follow form, not flatten it. Sharpen edges at focal points; soften elsewhere.
Worked example: a box and mug on a table. Establish horizon and two vanishing points; sight the box's front edge against its depth; draw through the box to check hidden corners. Place the mug's base ellipse, then rim ellipse, both sharing a vertical axis; check the rim is wider than the base because it is nearer eye level. Mark the cast shadow direction from the light source, then build tone in three passes. The reasoning is structural: every mark answers a measurement or a light decision.
Traps: outlining every contour, drawing ellipses as pointed shapes, mixing light directions, adding texture before proportion is right, and using only mid-tones.