LIB4D is a software library file used by Cinema 4D, a 3D modeling and animation software. LIB4D typically store initial settings for projects and can be used for created scenes.

LIB4D files allow to achieve more fluent work as they integrate predefined objects and provide easier access to the by program’s processes. All available LIB4D files are saved in "library" folder and can be accessed via custom hierarchy trees defined by users according to their needs.