Another background - C&C

[Shane 'ProgZmax' Stevens]

How did I make the gradient?  Well, I don't know what program you use but with mine all I have to do is specify a color at either end of a spectrum and apply a range to it to have it automatically fill in all the colors between them.  With wall gradients what you want to do is pick two colors that aren't terribly far apart in contrast so the shading looks as smooth as possible while still giving you some sense of shade variation (this way you can establish light sources by the direction of the gradient, though another method would just be to apply manual lighting to areas that require it).  Hopefully your program has some way of allowing you to specify a start and end color and then create a gradient within the range you specify.  Experimenting with the two colors can yield a lot of interesting results so don't be afraid to try two slightly different shades (light gray to blue-gray for instance) because those often yield the most realistic or eye-pleasing results.  Also, more colors + low contrast will result in a less visible gradient (less obvious dithering) while fewer colors + higher contrast will make the gradient more apparent.  It's up to you which approach looks better.  I look forward to seeing what you come up with!