1. SKETCHING
A sketch is a rapidly executed freehand drawing that is not intended as a finished work. In general, a sketch is a quick way to record an idea for later use. Artist's sketches primarily serve as a way to try out different ideas and establish a composition before undertaking a more finished work, especially when the finished work is expensive and time consuming. Sketching sharpens an artist's ability to focus on the most important elements of a subject and is a prescribed part of artistic development for students.

2. Sketches can highlight important information

3. We can use sketches to transfer information to a workspace…

4. Understanding Sketching Techniques
Analyzing complex objects
The ability to break down complex shapes into simpler geometric primitives is an essential skill for sketching and modeling objects
Basic curves and straight lines are the basis of many objects

5. Understanding Sketching Techniques
Essential shapes can be blocked in using construction lines

6. Understanding Sketching Techniques
Contours show the contrast between positive and negative space

7. Viewpoint As you sketch, you should maintain a consistent viewpoint
Examine the shapes you see from that viewpoint
Sketch the object as it actually looks, not how you envision it is

8. Shading
Adding shading to a sketch can give it a more realistic appearance
Hatching lines and stippling are common forms of shading

10. Shading maybe used for aesthetic appeal…

11. Drawings and Sketches
The following skills are important for sketches and drawings:
Accuracy
Speed
Legibility
Neatness

12. Freehand Sketching
Freehand sketches are a helpful way to organize thoughts and record ideas
The degree of precision of a given sketch depends on its use
A freehand sketch should show attention to proportion, clarity, and correct line widths

13. Maintaining Proportions
Sketches are not usually made to a specific scale
The most important rule in freehand sketching is to keep the sketch in proportion
Grid paper can help you maintain proportions

14. One View Drawings
Frequently a single view supplemented by notes and dimensions can describe a simple object

15. Pictorial Sketching
A pictorial sketch represents a 3D object on a sheet of 2D paper by orienting the object so you can see its width, height, and depth in a single view
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16. The three common methods used to sketch pictorials are:
Pictorial Sketching
The three common methods used to sketch pictorials are:
Isometric sketching
Oblique sketching
Perspective sketching

17. Perspective Sketching

18. Isometric Sketches
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19. Isometric Sketches
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20. Oblique Sketches
In oblique drawing, circles and angles parallel to the projection plane are true size and shape
Three things affect oblique sketches
Which surface is parallel to the projection plane
The angle and orientation for the receding lines depicting depth
The scale chosen for the receding lines

21. Oblique Sketches

22. Oblique Sketches
Forty-five degrees is often chosen for the angle of receding lines
Thirty degrees is also a popular choice and can look more realistic
In cavalier projection, receding lines are drawn at full scale
In cabinet projection, the depth is represented at half scale

23. Review…. Sketches… Are quick, but legible…
Help refine and develop ideas…(Allows designer a greater sense of overall perception (how feature look and relate to one another)).
Are used to document important information to be developed later…
Can be used to show customers what the final product may look like…
Are less expensive to develop that permanent document during the early stages of manufacturing.

24. Expectations:

30. Sketch pattern should fit that of the existing sketch in texture and weight

32. Applied depth in sketching…