Artistic Drawing / Perspective

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Single Point Perspective

Perspective drawing is a good style to use when drawing in 3D. There are different styles including single point and two point perspective. The basic example below shows how to construct a simple single point perspective drawing of a cube. Using the same skills more complex drawings/designs can be drawn, after a little practice.
http://www.technologystudent.com/designpro/perspec1.htm

Two Point Perspective
Perspective is a realistic way of drawing objects in 3D. We have already looked at single point perspective, two point perspective using two vanishing points and when an object is drawn in this way it is even more realistic than if it were to be drawn with a single vanishing point.
http://www.technologystudent.com/designpro/twopers1.htm

Oblique

Oblique projection is a method of drawing objects in 3 dimensions. It is quite a simple technique compared to isometric or even perspective drawing. However, to draw accurately in oblique projection traditional drawing equipment is needed

The technique for drawing a cube in oblique projection is outlined below, stage by stage. To draw it correctly in oblique projection three main rules must be followed:1. Draw the front or side view of the object.2. All measurements drawn backwards are half the original measurement.3. 45 degrees is the angle for all lines drawn backwards.
A. Draw the front view. Remember to use a T-square and 45 degree set square.
http://www.technologystudent.com/despro2/obli1.htm

Isometric


Isometric drawing is way of presenting designs/drawings in three dimensions. The example below has been drawn with a 30 degree set square. Designs are always drawn at 30 degrees in isometric projection. It is vital that drawing equipment such as T-squares and 30/60 degree set squares are used carefully. The drawing paper should be clip securely to a drawing board.
http://www.technologystudent.com/despro_flsh/isomty2.html