Friday, July 7, 2017

Perspective terminology

Let's get ready to learn the terminology of perspective and understand it too. There's a lot to remember and understand, so hang on and let's take it step by step. 
Knowing the fundamental rules of perspective and piecing them together will 
help you to make a more realistic picture.
This post will explain the rules that exist, which will help you to create the best illusion on paper. 
Knowing these rules will also mean you can choose to break them if you want to.

The image underneath shows the perspective terminology relating to what can we see.

                                   Here's a GIF showing the terminology in play step by step 
                                      from the Station Point (the person's point of view):


The next image is a different setting, looking through the Cone of Vision.
It shows how the proportions of objects outside of the Cone of Vision become distorted 
and this creates another vanishing point.

A good way to understand how objects are affected by the Horizon Line is to use a cup! 
Hold the cup out in front of you - when it is straight out in front of you, if you don't see the bottom or the top of the cup it's where the horizon line is (middle cup in the picture below).
If you move it down lower and you can see the top, it's below the Horizon Line (bottom cup)
When you hold it above the Horizon Line, you see the bottom of the cup (top cup) 

This trick can help you to see the effect of the planes on other objects in relation to the Horizon Line.

Helpful terms to know

Here are some great geometric terms to learn, they may be used when talking about perspective 
and will help you understand more of what's happening in an image. 

                                       (Oblique Angle)                                  (Right angle)

                                            (Parallel)                           (Obtuse angle) & (Acute angle)

Next will be one point perspective

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