first i wanted to say hello because this is my first post on the forums. so thanks for the add and here is my first contribution.
though it's maybe not the fastest way for windows but if you produce a bigger sheet it will be enough for a few houses.
when i did this the first time i added the windows afterwards to my building. later i just made them as a part of the walls with the space open in between. i applied the glass just by glueing a slightly bigger sheet of my glass-net from the inside with some pva.
as seen in the photograph i took some flyscreen/window-net and covered it with cheap nail-varnish. you can add a colorful sheet of plasitc to the back to make it blue.
if you're looking for a diamond-shaped net just go to your local market and buy some garlic. they usually are packed in a net like that.
because its usally not black i mounted the net with some pins to a sheet of cardboard with a hole in the middle and sprayed it with matt black spray-paint. the biggest issue of that net is its flexibility. after the spray paint it lost a bit of that but if you glue it to a (colorful) plastic sheet it will almost stay like this.
here are some close-up examples of clear materials i used to make some "glass", i put them on baking-paper, so it didn't stick to the surface i had it laying on
be aware that there are fluids that will dissolve the varnish and destroy the glass. (superglue)
1. Clear acrylic gel with a thin blue plastic sheet. i didnt have to use glue cause the gel did the job well. as you can see its a bit bubbly but the gel is very simple to use and can be used for various other things (water, fire etc.)
2. matt varnish . just sprayed it with some cheap matt varnish.
3. cheap clear and glossy nail varnish, heavily applied,
1. 2. 3.
and of course here how it could look on a building. the reason i made my windows all out of clear materials was to put led-light inside the houses to spice it a bit up
i think if you put some white/bright yellow paper behind these windows they should also look quite good without the leds.
i hope thats not too much - and of course i hope that helped someone