I notice a difference from what shown in the lesson. The displacement option (true… both… whatever) is not there anymore. I would assume there has been a modification from the version 2.76 used for the course. In fact I seem to remember to have read some about it somewhere.
Moreover, on 2.78c now the displacement effect is visible also on textured mode. Not only on rendered mode. Did I miss some somewhere?
Yes. I was looking for that in this lesson, and I found it also in the Materials/settings section. Now it appears that the lesson number is 200, because lesson 13 was added just now.