I remember seeing artists like this out in Las Vegas on Fremont Street. Great pictures are created from nothing taking less then Thirty minutes for these talented street vendors. I have seen some great art work from landscape pictures and superheroes. 

https://www.youtube.com/channel/UCie4NIPAH38aAP4BU7cnBAg

https://www.instagram.com/fobnart/

https://porfiriojimenez.me/