Cinema 4D Prime Object Manager Tags Menu Cinema 4D Tags Compositing
Function available in CINEMA 4D Prime, Visualize, Broadcast, Studio & BodyPaint 3D
Compositing Tag

Basic Tag GI Exclusion Object Buffer

Exclusion

Thanks to this new innovation, it is now possible to define in which objects an object should be reflected, and behind which transparency / refraction object it should be visible.

In the image below, a red sphere with a Compositing tag is mirrored by other spheres. You can include or exclude any of the gray spheres in the Include / exclude list to define which spheres will reflect the red sphere.

At the top left, all three gray spheres reflect the red sphere. The remaining three examples show various forms of inclusion or exclusion.

The Compositing tag is assigned to the object that is to be reflected (red sphere).

The same applies to transparency or refraction: The Compositing tag is not applied to the object through which another should be seen, but to the object that will be refracted.

So, what the Compositing tag’s include / exclude list does is tell an object that other objects will see it (Include) or not (Exclude).

Mode

You can select from:

Include

Drag all objects that should be affected by the effects (Seen by Transparency, Seen by Refraction, Seen by Reflection) from the Object Manager into the Include list.

Exclude

Drag all objects that should be excluded from the effects (Seen by Transparency, Seen by Refraction, Seen by Reflection) from the Object Manager into the Exclude list.

Object List

You can drag & drop objects from the Object Manager into this list. By using Shift + Ctrl/Cmd you can select and deselect multiple objects. Selected objects can be deleted by pressing Backspace or Del., or by right clicking (a menu will open in which you can delete all or only the selected objects).

You will see four symbols under each object. If the symbol is not active it will appear faded. You can determine which effect will be included or excluded for that object.

The (selectable) symbols have the following properties:

Transparency, Refraction, Reflection, Hierarchy

Hierarchy: If you drag an object into the list, this switch determines whether or not its child objects should also be taken into consideration.

As practical as these settings are, only use them if absolutely necessary. If you create such a scene and return to it months later, for example, you will probably have a very difficult time finding out why what was reflected or refracted and why certain objects are invisible, especially if you have several light sources and Compositing tags.