1. Look at the Depth Perception wikipedia entry à http://en.wikipedia.org/wiki/Depth_perception, specially to the Monocular cues list (which is your case because you are not implementing Binocular vision/Stereopsis). Interesting effects include the Depth from Motion, the concept of Perspective plus the Motion Parallax effect (which is not directly related to your project but it is nice! they used to implement it in several late eighties scroll-sided videogames such as Shadow Of The Beast for the Commodore Amiga).
   
   
2. FOV in Half Life 2 (the game) à http://developer.valvesoftware.com/wiki/Field_of_View
   
   
3. Depth Cue à http://www.gamedev.net/reference/articles/article861.asp
   
   
4. Matrices:
1. Shear: http://en.wikipedia.org/wiki/Shear_matrix
2. Oblique projection: http://www.cs.brandeis.edu/~cs155/Lecture_08_6.pdf (it appears within this lecture)

     5. See what this guy talks about… http://www.cs.unc.edu/Research/stc/publications/Raskar_sig99.pdf