I take myself as a reference.  Here this ray of light is the facade of the lottery and with the cursor I go to the line and when I get to the bottom I extend it towards the middle.  And then a trick to make the transition between photo and photo as fluid as possible..  What I usually do is in the center of the photo pull forward and take a point.  reference.  Here I am taking it, here there are like two screens or two boxes so I put the cursor in this column here.  And I go forward and I see that I have gone to the screen on the right that should have.  gone here.  So since it has gone to the right my trick or my advice is, we come back because we are.  In this view, when you click on the view, move to the right, which is where.  It's gone and I'm doing preview again with control from here.  And so I adjust the two views, the one going and the one returning.  Okay, we go back and the same way I take a reference point and I see that now it is.  has gone a little backwards.  I put the cursor, now I am navigating with the keyboard cursor arrows.  Well, I place my reference point and I see that it goes to the left, slightly towards.  the left.  So let's move it a little less..  I'm also going to go to this point and check how the return or outbound trip is, it depends on where we are looking..  I put the point here in this security separator.  And here, for example, it is more fluid, this one is fluid and this one is already fluid..  You see the cursor, it takes me there, that's what I do when I add any hotspot.  Now it's going more smoothly, we're going back.  No, now you see, if we put the cursor on the box of the photo machine it goes to the column.  So this has to be moved to the left..  It goes this way, so we move it this way.  We preview again.  Now the transition is more fluid and we go back.  And I take these two supports as a reference and it took me to the one on the left.  Let's see, since these are different times, I'm going to look at something that hasn't changed, which is the hat..  I come forward, the hat.  No, you see, if I take this piece of hat as a reference, it has gone towards the center..  Then a little more, we return and thus adjust completely.  A little more to the center.  Well, for example, what we have said, if it was on the line, it is very likely that it is there..  Now yes.  And now here too.  This trick to linearize navigation is not explained anywhere, but as a result of trial and error, by varying and trying, you see that it refines the connection between a photo.  and the other.  The algorithm or system that 3D Vista uses to join one photo with the other, well we don't know.  exactly how it works.  But for example here we already have more fluid navigation and the return is exactly the same..