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Accurate sketching is an important skill for a designer to develop and for this reason there is an emphasis on sketching in this course. You will find that the quality of your sketches will be important when projects are marked and there will very likely be some sketching questions on the exam.

Many students complain that they are not good at drawing and sketching, but remember that this is not about natural talent or artistic skill. Effective sketching is about applying construction techniques to accurately present your ideas.

There are  a range of different sketching techniques which each have their place and you should practice them all and use them appropriately.

Isometric projection
Isometric drawing is a way of representing the illusion of 3D on a 2D page. An isometric projection accurately conveys scale and dimensions, but in creating the 3D effect the image is distorted so that circles are shown as ovals and rectangles as paralellograms. Isometric drawings are good for planning and to show what the model will look like, but they are not useful as templates to assist construction.
For information on isometric projection page refer to our class wiki.

Oblique projection
Oblique projections are another way of simulating a 3D object on a 2D page. Oblique projections show the front view correctly, but the other views are distorted and backwards dimensions are halved, to create the 3D effect. oblique projections are easier to construct than isometric projections, but the 3D effect is not as visually convincing. There is further information on oblique projection in the class wiki.

Perspective drawing

Perspective drawing is a technique for adding the illusion of depth to drawings. Adding perspective removes correct scale from the sketch, so these drawings are good to show what a 3D object or scene looks like, but they do not provide true information about the dimensions. Click here for more information on perspective drawing.

Orthographic projection
Orthographic projections show the object from different directions. The standard we use in Australia (and the USA) is called third angle projection, and we see at least three separate images showing the top front and right side of the object. (If necessary bottom, back and the left side can also be shown.) Orthographic projections do not attempt to simulate 3D, but they do show all parameters to correct scale and are useful to use as templates to model from.

There is further information, including an example of how to correctly construct an orthographic projection in the class wiki.

Sketching practical work
We will complete some simple activities in class to practice these techniques and there is a sketching assessment task for you to complete. To access this task click here.


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