Trying to add some details on street, as similar as we have always see some garbage on floor. I tried with some simple cube first, as I used a vertex map on the surface of the road and link with a Cloner to distribute them on yellow area accordingly.

Then I built crumpled paper and folded paper as garbage to replace the cubes. I saw a tutorial by Ukramedia that it showed a skill to create crumpled paper with softbody and colliderbody dynamic, by scaling down a sphere, the paper geometry inside the sphere can deform into a crumpled one effectively.

Instead of duplicating every objects and place them accordingly, I prefer to place them randomly with Octane Scatter to save some render time.