Design and Visual Communication
NCEA Level 1 Design and Visual Communication (DVC) assesses how well you communicate design ideas visually: freehand sketching, instrumental drawing, projection, rendering and the design process. Marks reward correct convention and clear annotation, so examiners look for accurate line types, aligned views and notes that explain decisions.
Line conventions
- Visible outlines: continuous thick.
- Hidden detail: dashed lines.
- Centre and cutting-plane lines: chain (long dash–short dash).
- Dimension, leader and hatching lines: continuous thin.
- Construction lines: thin and light.
Projection
New Zealand uses third-angle projection (AS/NZS 1100): the top view sits above the front view and the right view to its right; first-angle reverses this. Orthographic views show true shape and size, so align each view with projection lines from the front and keep one scale. Add hidden lines where an edge is not visible.
Paraline drawings
Isometric has a vertical axis and two axes at 30° to the horizontal. Only isometric lines are true length: build an isometric box first, then cut the shape, and join located points for non-isometric edges. Oblique keeps the front face true shape with depth receding; cavalier uses full depth, cabinet half depth. Circles become ellipses.
Rendering
Choose one light source and keep it consistent across every view: surfaces facing the light are lightest, those turned away darker. Use cast shadows, hatching and gradients to describe form, and increase contrast at edges and changes of plane. Rendering clarifies form rather than decorating.
Worked example
An L-shaped block is 60 mm wide, 40 mm high and 25 mm deep, with a 20 × 20 mm step removed from the top right. Front view: a 60 × 40 rectangle with the step cut out. Project lines right for the side view (25 × 40) and up for the top view, placed above the front in third angle. The step's rear edge is hidden in the top view, so draw it dashed. Dimension width, height and depth once, on views showing true length.
Traps
Common traps: mixing first- and third-angle placement; treating non-isometric lines as true length; dimensioning hidden edges or repeating dimensions; changing light direction between views; describing a designer's style without linking it to your design.