A 3D, or three dimensional object, exists in three dimensions. How can we represent the object in only two dimensions. Two dimensions consist of height, or length, and width. With a little bit of trickery we can fool the eye into thinking there is a there is another dimension, depth.
Depth can’t exist in two dimensions, but with use of light and shade and perspective, it is possible to make a hyper-realistic image that can be so convincing that you would want to reach out and touch it!
This video will give you an introduction the the concept of drawing three dimensional representations on a two dimensional surface.
The course index is here : http://www.shooraynerdrawing.com/everyoneindex/
