Final post of work from Dirt5, this is the work I did for interior and distant windows on buildings. This post shows a snippet of how they work and look, big thanks to Andy Line for the help with the pics and creating a great track!
https://www.artstation.com/andrewline1997
Window textures are picked from an array using uv positioning and colour sets
Example of colour sets
Here I made a tool that would aid in colouring the colour set correctly and allowing for adding extra affects like frosting.