I'm trying to recreate real cities in a video game in a 1:1 scale and it's quite tedious to get every proportion right (let's say it's close to impossible).
So I've come up with an idea but I really don't know how to make it happen. I think this is the right SE to ask (if I'm mistaken I will delete my question).
Let's say I have this google map screenshot :
And this is my game in windowed mode :
Is there any way to render the google map screenshot as a low opacity window, while letting me have full control of my windowed mode game with constant input ? So I could use it as a tracing paper and easily reproduce real life dimensions