Ok, this next part is what stumps most people trying to create nice looking buildings with cool windows. The easy (and recommended) way of creating glass for your buildings is to use Adobe Photoshop or similar. All you need to do is create a separate layer, fill the glass area with a light blue colour, and adjust the transparency of the glass layer (see below for example).

Figure 4.3                       | Figure 4.4 |                        Figure 4.5

Creating your glass within MS Paint is a lot more difficult on the other hand. We are going to use a selection of different blue colours. If you have detailed the inside of the window with a room then all we need to do is go over the outlines of the furniture and objects inside the window frame with a darker blue colour. The rest of the window is then filled with a lighter blue colour, and a highlight can be added over the top. See the images below for the before and after shots. I have also added the blue pallete I used for the glass and highlights.

Figure 4.6                                Figure 4.7