Chapter 20 Directional light

In Chapter 20 after adding Directional light I see the shadow of the MrPig at any place of the floor and no matter where Directional light is placed.
So I could not understand why lightFollowNode need to follow MrPig?
Also in the chapter you write that Directional light has some limits:

@chrislanguage Can you please help with this when you get a chance? Thank you - much appreciated! :]

not really sure but i believe they updated SceneKit in Xcode 10
maybe thats why it works now ?
it get better at performance every year :smiley:

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