1. Simple concave models

2. New SketchUp document

3. Simple concave models After dragging a vertical rectangle, we get...

4. Simple concave models a vertical surface

5. Simple concave models Let's start to draw...

6. Simple concave models... a rectangle on this surface

7. Simple concave models When we have finished the rectangle, choose the select tool and...

8. Simple concave models...click inside the rectangle we have just drawn. Then...

9. Simple concave models... when we press the delete key, the rectangle is removed from the surface

10. Simple concave models Use the orbit tool to move around the model and...

11. Simple concave models Use the select tool to select the surface and then...

12. Simple concave models Choose the push/pull tool to...

13. Simple concave models... turn the surface into a 3D prism

14. Simple concave models Choose the orbit tool and...

15. Simple concave models... move around the model to see the tunnel we have created

16. Simple concave models Choose the rectangle tool and...

17. Simple concave models... draw a rectangle on a surface of the model

18. Simple concave models Use the select tool to select this new rectangle area Then, when we use the delete key,...

19. Simple concave models... the rectanglular area is removed from the surface and... we can see inside the model

20. Simple concave models Draw a rectangle on another surface

21. Simple concave models When we remove this second surface rectangle, we can...... see through the interior of the model and out the far side

22. Simple concave models Below, see an earlier version of the model

23. Simple concave models Draw a rectangle on one surface and select it

24. Simple concave models Choose the push/pull tool Pushing the rectangle into the model, creates a...

25. Simple concave models... an indentation on the surface but... does not break through the surface into the interior of the model

26. Exercise Tackle Exercise 22