I had to resize the above picture to get it under 100K. But it still looks decent enough.<br /><br /><font color="yellow">Who has made this image is a terrible idiot.</font><br />The shot was taken by Neil Armstrong and developed by someone at NASA (I doubt they sent out to 1-Hour Photo).<br /><br /><font color="yellow">You surely at school have made some perspectives.<br />Well, if you have to make the perspective of a cube, you must first draw the horizon line, the virtual line that stay at the height of your eyes.</font><br />I'm not sure what that has to do with this picture. I'll admit that the horizon looks close, but also remember we're dealing with a body only 3000 miles wide with a vaccum for an atmosphere. So naturally the horizon will appear closer.<br /><br /><font color="yellow">Right? Right as Mars is not a cucumber.</font><br />That is one of the few things you have got right in this thread. Mars is a planet, not a vegetable.<br /><br /><font color="yellow">If you are on the beach and look at the horizon, you notice that the horizon line moves in synchrony with the height of your eyes.<br />If you go on the tall chair of bathing-attendant, also the horizon line moves up at the height of your eyes.<br />If you go on a hill and look at the sea, you notice that also the horizon moves up at the height of your eyes.<br />Right?</font><br />Wrong. The higher you go, the lower the horizon goes.<br /><br /><font color="yellow">Well, can we know where is the horizon line in those situations in which we do not see the horizon (for example because there is a building in front of us)?<br />Yes, we can.<br />How?<br />If we have in front of us the image of a cube, it is sufficient to join with a line the two vertex at the bottom on the left.<br />Then it is sufficient to join with another line the two vertex at the bottom on the right.<br />The point of intersection of the two lines will give us the height of the horizon line.<br /><br />IN T</font> <div class="Discussion_UserSignature"> </div>