I came up with this idea for making a realistic Flowlab game a few days ago and here it is:
Just take a picture of a real-life location and put that as a backdrop, than just use invisible blocks where the ground would be in said picture!
For the character and other interactive objects, just use a green screen and put people in front of them to make animations!
If you want, you could also use a drone to get a top-down view! (That definitely would make getting believable animations easier!)
Now, the reason i personally ain't going to be attempting to execute this: This idea would require a LOT of resources outside of Flowlab!
Here's a list of what you probably would need to execute this and the cost:
*Unless you're willing to spend dozens of hours in photoshop to get characters to move, you'll need a green screen: About 10$
*Of course, you're going to need consistent lighting from a flood-lamp or something as well: 30$ (For the kind WE'RE looking for)
*If you're getting a side-view, you're gonna need a pretty good camera: About 85$ (And that's being generous!)
*You're also going to need a tripod so all the pictures line up: About 21$
*If you're getting a top down, you're gonna need a drone with a camera: 15$ (And that's a rather cheap one)
*For the running animations, a flat treadmill would be a rather smart idea: 120$ (That's the cheapest one i could find!)
So, not including traveling costs, the grand total to execute this project is: 281$!
Yeah, it's safe to say not many people will be willing to spend much on a game for Flowlab. But that IS just a idea!