Need some help with perspective drawing

[The Weird Sir]

Here's one of my first attempts at trying out the new rules of perspective I've just learned:

http://www.geocities.com/weird_sir/hotel_room.GIF
(if the link doesn't work try copy & paste)

Okay, my question is this: how can I get the two doors to look the same size? They're on different planes so it's hard to tell. Can anyone help me here?

[MrColossal]

all you gotta do is draw a straight line from the top of the door facing us and draw it over so it touches the wall to the left, then from that point where it touches that wall draw a line from your vanishing point through it and BOOM you got it

make sense?

[Alynn]

from what I can tell it looks correct, but if you want to be certain they are the same size take the horizontal line of the front facing door and extend it to the connecting wall, any line that intersects where those two lines connect and the vanishing point will be perspectively the same size...

hope that helps