Yep thats right, i finally got to it:
The sketch:
(http://www.2dadventure.com/ags/Sketchy.gif)
The image:
(http://www.2dadventure.com/ags/Room6666.gif)
This is my FIRST EVER attempt at this, and i think it came out quite nicely.
Yay! This was certainly a surprise to see, but one which I am totally happy to witness. And yes, you are right, for a first attempt, it DID come out quite nicely. In fact, I'd say it came out pretty damn fine.
A couple of pointers - there's something about the stairs. They themselves have been drawn from a perspective that suggests they go DOWN, and the wall rail would agree with that, but the free-standing rail on the right makes it look like they go UP.
Also I'd change the texture you're using for the floor - it just doesn't quite suit the flat colour palette you're using for the rest of the picture. But if you DO stick with it, at least make the carpet texture a little different. It doesn't look like a throw rug in front of the door right now (like I think it's supposed to be). It just looks like a piece of the same carpet that's been dyed red with a black border.
Apart from that - my wholehearted congratulations - and I hope to see more of this quality work soon :)
I see in the scetch that you drew vanishing point lines. Whereas there's much to tell about how high the horison you used is, I just wanted to focus on the fact that besides of the walls, nothing else uses the same vanishing point or the same horizon. Maybe you could work on that a little.
Furthermore, the desk is pressed right up against the wall, so there's no space for anyone to sit and work on the computer. The door uses an additional vanishing point set very low for no reason, whereas the rest of the room is 1-point.
Nonetheless, I can tell you that this is a servicable background, and you could very well make a good game using such rooms. My points should apply only if you're interested to advance artistically, regardless of whether your art is good enough to make a game with.
Some more things:
-the receptionist won't be able to see whoever's standing before his desk
-cables connect tower and monitor but why are there three of them and where are the other cables?
-the stairs look wrong, the yellow triangle should be red, and it shouldn't be a triangle in the first place:
(http://www.2dadventure.com/ags/stairs.png)
wall and stairs meet at green line
I am going to note all these things you guys pointed out and be more careful next time not to do it again. I am not going to fix this one, as it was just a test to see if I could do it. I will make a more detailed outdoor scene later, when I have some time.
if you feel like it, then you could add some details on the computer, etc. fan, some inputs, and so on
Tanker, your artwork keeps getting better and better. Keep up the good work and keep practicing.