c) How to use Undo http://www.youtube.com/watch?v=ZKIVPTVh5IY&feature=channel

Ok, so I watched the video on undo.  I get it, cntrl-z, undo, etc.  This is all pretty standard stuff.  Though I admit I was surprised to see that they decided to implement undo separately for each object.  That is sort of unique.  Of course, that is also the reason why you have to make sure a given object has the focus before you can undo it.  But I guess in this world building situation this type of undo would be preferred to a global undo.

So, here's how I tried to do it.  First, I create a primitive:

Then I move the primitive somewhere far.  Not only is it far away, but I got it stuck in a rock and a wall at the same time.  This is not good:

Of course this is the point at which I want to undo my mistake.  And I really expected undo to be there.  But lo and behold, no undo.  Apparently, RW does not yet allow for undo.  So instead of taking the screenshot of the undo process, I'm simply left with having to delete the created object and starting again.  Of course, I could have just moved the object back to where I started, but since I created expressly to demonstrate undo, and there is no undo to be found, I decided to just delete it.