Advanced Render

This is one of my best renders I believe, I ever made. This is when I started to use radiosity. Radiosity, called Global Illumination in C4D, allows other objects to cast light upon eachother. Without this, most objects will look bland and flat. As shown, the illumination mat on the sphere casts a yellow light opon the ground- which has to reflection. Radiosity also adds softer shadows, showing a more realistic combination of shadows from the different light sources. However, with the low capabilities of my computer, the prepass was limited. you can see blotchy shadows on the plug wire to the ground. With higher prepass, this would be much smaller, and harder to tell.
These two images show a very good example of how radiosity works. the bottom (without) has no omni lighting, and none what so ever, except auto-light. The top (with radiosity) is the same deal, but has a skybox. Auto-light wasn't turned off, and that's easy to tell since everything is very bright.
But, by simply turning Global Illum on, it can create 3 objects interact with each other through lighting. The downside is, is can quadruple render time, which in some cases, can lead for hours on end. that's why, in certain images, such as abstract ones, I leave radiosity off.