Allow 40min - teacher preparation minimal.
The sketch pad,HB pencil, ruler.
To Begin revise: Method of introducing light source and estimating its ground position. Ask which way the shadow should be directed, forward or back.
b) Construct the simple corner of a room using a CVP.
d) 'cd' is parallel to 'ab'. Construct as shown with lines to VP.
e) Add the ladder 'rungs' and firm them in.
f) Establish the light source - drop to floor and construct shadow lines as demonstrated above.
h) Shade in the shadow 'freehand' as shown.
Experiment, add other objects ... a bucket on the floor and its shadow.
i) Construct and complete the shadow as shown and shade it in. The student should note that if point 'a' is brought forward the shadow will point backward.
Experiment, try adding some other objects such as vertical poles and draw their shadows.