The other two missing libs I found here.
But now I get the error:
NullPointerException
Could not run the sketch (Target VM failed to initialize).
Make sure that you haven’t set the maximum available memory too high.
The line 534 face = box.getChild(1); was highlighted
I tried different memory settings without result.
Edit: I commented line 534 until 541, and now it works.
It’s a pity that my PC is so slow, it’s running at 2,5 fps.
But it’s really an incredible lib. I’m going to explore it.