Sorry about the small image but this is what I decided to do for testing some of the materials in unity, normally I work on vfx so I make my own materials and textures in the engine so it was not a foreign concept to me. I didnt do anything too complicated just changed the original material for the walls from green to gray, and the ball in the middle was a cement pole so I ended up changing it to a metal graffiti ball with a yellow tint.
This is how it would look without any editing.