Please note that section planes are not supported in Indigo RT.
This is a short tutorial explaining the use of section planes with Indigo for C4D.
1. Add a section plane object to your scene. It can be found under "Plugins" -> "Indigo for Cinema 4D" -> "Indigo Section Plane".
2. Move and rotate the section plane object in a way you would like it to cut your scene. The section plane will currently cut the whole scene. Everything in the opposite direction of the Z axis (blue) will be cut.
You can have as many section plane objects in your scene as you like.
3. Render the scene. If everything worked you should see a result like this: