Glossary
Containers are Track View items with multiple branches that provide a complete definition of something in your scene.
Container items that appear in the Track View include:
Materials definitions with all parameters, maps, and sub-materials.
Maps containers with all map types and map parameters.
Single Map containers with a single map type and its associated parameters.
Object containers directly below a named object item defining the creation parameters of an unmodified object.
Modified Object containers holding all of the modifiers applied to an object as well as the creation parameters.