Hi Rob,
here is the perfect solution for real visualisation of a building:
1. put some folks into your 3d world.
[Blockierte Grafik: http://abbund-cad-service.de/dhp/view01.png]
2. push and turn them exactly to your prefered point of view and give them a camera.
[Blockierte Grafik: http://abbund-cad-service.de/dhp/view02.png]
3. move the scene in OpenGL, so that you have a look through the person's eyes,
then you see the real propotions of the planned building.
[Blockierte Grafik: http://abbund-cad-service.de/dhp/view03.png]
4. BUT: do never give the camera to your wife.
She's not only 4 inches shorther than you
and standing 3 feet beside you.
What you saw was very exactly.
Believe me or not, what she will see from her point of view
is rather different...
[Blockierte Grafik: http://abbund-cad-service.de/dhp/view04.jpg]
...it's REAL!