Week 6

Week 6 :

Tuesday, October 2

  • Today we started class with a quiz on formal perspective. I had you draw two cubes - one in one-point perspective and one in two-point perspective.
  • I demonstrated "informal perspective" which is also called "sighting".
  • Sighting is an alternative to formal perspective. It is less precise than formal perspective but more practical in most drawing situations. Usually to draw accurately using formal perspective vanishing points would extend off your drawing paper or require you to draw very small.
  • There are two kinds of sighting: sighting angles and sighting proportions. See the illustrations below for a more in depth explanation.
  • The remainder of class was spent working on a two-point perspective drawing of a building or part of a building using the sighting techniques I demonstrated.
  • We will continue working on this drawing the next class.

Oct 2 10月2日(Translated by Google Translate)

  • 今天,我們開始上課的測驗正式的角度。我有你畫兩個立方體 - 一個在單點透視,兩點透視。
  • 我演示了“非正式的角度來看”,這也被稱為“瞄準”。
  • 瞄準是另一種正式的視角。這是不是正式的角度,但不太精確,更實用的繪圖情況。通常繪製準確地使用消失點正式角度將擴大繪圖紙或要求你畫得很小。
  • 有2種瞄準:瞄準角和瞄準比例的。下面的插圖更深入的解釋。
  • 花了二點透視圖的建築物或部分的建築使用的瞄準技術,我演示了類的其餘部分。
  • 此圖的類,我們將繼續努力。

"Informal Perspective" or "Sighting"

In sighting we don't use the elements of formal perspective like horizon line, vanishing points, and converging lines. Instead we use a straight edge like a pencil to see angles and proportions more clearly. This is less precise than formal perspective but usually more useful.

Having a solid understanding of formal perspective is still very important and will help when using the sighting techniques I discuss here. Both are equally important to understand.

Buildings like this can be especially difficult to draw using formal perspective because of irregularly shaped walls and odd angles.

If we fill a sheet of paper with our drawing the vanishing points required by formal perspective would be somewhere off the paper. This is often the case and one of the reasons sighting tends to be more useful. 

Sighting helps us determine angles and proportions without having to draw in a horizon line or vanishing points. It will also make it easier to determine irregular angles of this roof line. 

1. Sighting Angles

Hold your pencil perfectly horizontal next to the edge of the building you are trying to draw. Look at the wedge shape created by your pencil and the edge. 

This is another example where the wedge is much narrower. When you go to draw that edge of the building it will be much easier to remember the shape of that wedge than to remember the exact angle of the edge. You can hold your pencil up to your drawing paper or just use the edge of the paper as a perfect horizontal.

The same technique can be used by holding the pencil perfectly vertical. Horizontal and vertical are good points of reference in drawing because you always have the edges of the paper there as a guide. 

Acute angles (angles less than 90 degrees) are easier to remember so it would be better to hold your pencil horizontally to sight the angle of this edge. 

2. Sighting Proportions

When you sight proportions it is very important to always hold your pencil at the same distance from your eyes. For this reason it is best to fully extend your arm and lock your elbow each time your sight proportions.

When we sight proportions we are comparing the lengths of various edges on the building. For this we don't need to hold the pencil perfectly horizontal or vertical rather the pencil acts as a measuring stick.

Choose an edge to start with. A medium length edge will work best. Extend your arm with your elbow locked. Hold your pencil parallel to your face (don't point it forward or backward). It should be flat on your imaginary picture plane. Use your thumb to mark the length of the edge on your pencil. 

With you thumb held in the same place compare that length with another edge on the building. In this example I see that the second edge is slightly shorter than the first. 

Still using my first measurement I see that the roof line is a little more than twice the length of my first edge. Remember the length on the pencil is not what we need to remember - it is the relationship between the edges. In this example the roof line is a little more than two times the first edge I measured. When I go to draw that the measurements might be different but the proportion (relationship) will be the same. See below for another example. 

HOMEWORK ASSIGNMENT: Draw a piece of architecture in two-point perspective using the sighting technique explained above. I will walk you through the steps here. If you get confused email me which step you are confused about so I know what to clarify.

Find a building or part of a building (doorway, fence, bench) that is an interesting example of two-point perspective. 

Using your larger view finder and picture plane frame the building in an interesting composition. Consider the negative space too. 

Use your expo marker to mark a single edge from the building on your picture plane. This will be your basic unit. This will be the edge you use to sight proportion. 

This one line is all you should draw on your picture plane. Nothing else. 

On a piece of drawing paper trace around the outside edge of your view finder. This will be your drawing size. It is slightly bigger than the composition your found using the inside edge of the view finder so you will have to practice enlarging what you see in your drawing. 

Prepare your drawing surface with a layer of graphite and  horizontal and vertical center lines. 

Look at your picture plane and copy the basic unit line onto your drawing. 

Remember your drawing is slightly bigger than the composition you made with the view finder so your basic unit will be a little longer on your drawing than it is on the view finder. 

Use the sighting techniques I explain above to determine the angles and proportion of the edges of the building. In this picture I use my thumb to mark the length of my basic unit.

Using this measurement I determine that the wall is twice as tall as the length of my basic unit. So when I draw the wall I know it's relationship to the basic unit in my drawing. 

Here are some other examples of how my basic unit compares to other edges of the building. 

Remember your drawing is bigger than what you are looking at so you will have to take a new measurement of the basic unit on your drawing before you apply the proportion you sighted from the building.

Thursday, October 4

  • At the beginning of class we reviewed the sighting technique I demonstrated last class. We looked at the illustrations I have posted here on the website. If you have any questions about sighting or don't understand, email me which step you do not understand so I can clarify.
  • The remaining time in class was spent working on our drawings.
  • Your drawing pads are due next Tuesday. I gave you a list in class of what drawing should be in your drawing pad and what order they should be in. That list is also posted below.

Oct 4 10月4日(Translated by Google Translate)

  • 在剛開始上課的,我們回顧了我演示了最後一堂課的瞄準技術。我們看了我在這裡已經發布在網站上的插圖。如果你有任何疑問,瞄準,還是不明白,給我發電子郵件哪一步,你不明白,所以我可以澄清一下。
  • 其餘的時間在課堂上花了我們的圖紙上工作。
  • 您的繪圖墊下週二到期。我給你一個類圖應該是在你的繪圖板,他們應該是什麼樣的順序。這名單也貼在下面的列表中

Art 20A: Drawing 1 

The following projects are due next Tuesday, October 9. Please make sure all the drawing assignments are in order and clearly labeled with either the number or title listed below. 

You will turn in your whole drawing pad for grading. I will be returning them to you the following class. Please do not turn in a stack of loose papers. 

If you have any questions email me: trentreynoldssmc@gmail.com


  1. Upside-down drawing (copy of Picasso’s drawing of Stravinsky)
  2. Your hand
  3. Negative space drawing of a chair.
  4. Paper-cutting project
  5. Shoes
  6. Art department hallway in one-point perspective
  7. One-point perspective drawing of a room in your house
  8. Three drawings of cubes in two point perspective (above, on and below horizon line)
  9. Two point perspective drawing of a building using “informal perspective” or “sighting”
  10. EXTRA CREDIT: Two point perspective drawing of a building using “formal perspective”