2. Two point..
Ref:

3. Two point..
draw the horizon line almost at the top of your page (A3 paper is useful here).
Add two points at either end of the line.
Hint: keep them wide….
first draw the front edge.

4. Two point..
Draw the corners back to the vanishing points

5. Two point.. Now you have to estimate where the back
Edges of the cube will be, think about the cube
proportions

6. Two point..
Finish the top edge, hint: they still go off to the same points

7. Two point..
Try repositioning the cube

8. Distortion
The angle nearest the viewer should not be less than 90 degrees
That represents an impossible scenario.

9. Foreshortening:
Length a. is shorter than b. because its surface is more angled away from us

10. Two point..
Its important to practice drawing the basic cube in proportion, because then you can use it to draw other objects.
Remember foreshortening

11. Viewpoint some experimenting may be necessary.
Here, the side view of the truck is most informative.

12. Start Simple:
Using cubes

13. Start Simple:

14. Start Simple: All objects can be made up from 4 basic shapes: Cubes
Spheres
Cylinders
Cones

15. Ellipses and Circular forms:
Circles in perspective =

16. Note that the minor axis is always vertical for upright cylinders
Note the widening of the ellipse
i.e. increase in minor axis, as the eye descends .
This relates to foreshortening.

17. Now draw some vertical cylinders:

18. Ellipses and Circular forms: use the minor axis of the ellipse

19. Ellipses and Circular forms: adding details

20. Ellipses and Circular forms: draw these in perspective…

21. Horizontal forms:
the minor axis of the ellipse aligns with the line to the vanishing point
Note that the ellipse gets wider (minor axis longer as it moves towards the vanishing point.