SDK Change Notes for Cinema 4D 2026.0

Summarizes the API and API documentation changes made between Cinema 4D version 2025.3.0 and 2026.0.0.

Documentation Changes

Major Changes

• Fixed an issue with c4dpy not picking licenses.

Minor Changes

• Added minor features to mxutils, mostly revolving around debugging.

• Added efficient way to generate a low polygon representation of a given object via c4d.utils.ConvexHullDecomposition.

• Updated ASSETDATA_FLAG documentation to include COLLECT_NODES_ASSETS, DONOTRESOLVE, and WITHFONTS.

• Updated Graph View Node Types to correctly reflect all Xpresso graph node types.

API Changes

Cinema API

• Added c4d.utils.ConvexHullDecomposition.

• Added c4d.documents.FrameScene().

• Added support for sending and receiving c4d.MSG_MULTI_MARKMATERIALS.

• Added support for sending c4d.MSG_CHECKINSIDEUNDO.

• Added c4d.ClearPythonConsole().

Maxon API

• Added maxon.Array.

• Added support for list of tuple for maxon.DragAndDropDataAssetArray.SetAssetDescriptions().

• Updated error message when unknown datatype is returned by a maxon API method.

• Fixed maxon.AssetDependencyStruct was not possible to create in Python.

• Fixed maxon.AssetDependencyStruct.updatePolicy was not usable.

• Fixed maxon.AssetInterface.CreateRepositoryFromUrl() not working the first time it was called.

Mxutils API

• Added mxutils.SymbolTranslationCache for caching integer to string symbol relations in modules.

• Added mxutils.g_c4d_symbol_translation_cache, a global instance of mxutils.SymbolTranslationCache for the c4d module.

• Added mxutils.GetContainerTreeString for generating a tree string representation of containers.

• Added mxutils.GetParameterTreeString for generating a tree string representation of the parameters of a scene element.

• Added mxutils.GetSceneGraphString for generating scene graph string representations for scene elements or whole documents.

• Updated mxutils.RecurseGraph() to yield uniform depth level increments of 1 for all elements in the graph (when using complex yielding).

• Updated mxutils.CheckType() and mxutils.CheckIterable() to be not to be bound anymore to the global and local scope for symbol discovery.

• Fixed mxutils.GetTreeString() to handle hierarchies correctly in all cases.

• Updated mxutils.ImportSymbols() to support parsing a single header file.