How to make like these renders?

[Adam Trachtenberg]

You mean the floor? Create a material with reflectance and place it on the Floor Object. Add a compositing tag to the floor and check the “compositing background” box in the tag’s properties.

[Nikolay Kirkov]

try this tutorial. but it works only without GI:
https://greyscalegorilla.com/blog/tutorials/how-to-make-the-infinite-floor-look-in-cinema-4d/

[Paul Birman]

No not the floor 🙂 I’m not beginner, but I was wondering how to create cartoonish style like this render. If with sketch and toon, then whats the settings 🙂