SDK Change Notes for Cinema 4D 2026.2.0

Summarizes the API and API documentation changes made between Cinema 4D version 2026.0.0 and 2026.2.0.

Documentation Changes

Major Changes

• Updated c4d.documents.RenderDocument() workflow to offer a more streamlined experience when rendering modern OCIO documents which is explained in a suite of new rendering examples.

• Added the ability to read and write SDS weighting data through the new c4d.HNWeightTag class.

• Added the ability to do efficient nearest neighbor searches through the new c4d.utils.KDTree and c4d.utils.KDTreeQuery classes.

Minor Changes

• Added associate_nodes_2026_2.py example.

• Added batch_render_post_process_2026_2.py example.

• Added batch_render_pre_process_2026_2.py example.

• Added render_document_complex_2026_2.py example.

• Added render_document_hardware_2026_2.py example.

• Added render_document_preroll_2026_2.py example.

• Added render_document_set_engine_2026_2.py example.

• Added render_document_simple_2026_2.py example.

• Added render_document_tiles_2026_2.py example.

• Added sds_weights_2026_2.py example.

• Added py-cmd_tool_finalization_2026_2 example.

• Added kdtree_shortest_path_2026_2.py example (and its optimized version).

• Removed batchrender_adds_document_r13.py.

• Removed batchrender_loops_queue_r13.py.

• Removed render_current_frame_r12.py.

• Removed render_ogl_half_size_r12.py.

• Removed render_settings_double_size_r13.py.

• Removed render_with_progress_hook_r21.py.

• Updated open_color_io_2025_2.py example to use the new rendering method for OCIO documents.

• Updated Render Flags Table to include new render flags and better descriptions for some older flags.

• Updated the description of c4d.EventAdd() to better reflect its usage and thread-safety considerations.

• Updated the description of c4d.InExcludeData.GetData() to clarify that retrieving IN_EXCLUDE_DATA_SELECTION only works when the owning InExcludeCustomGui has set the description flag SEND_SELCHNGMSG.

• Fixed a bug in the sphere modifier example and renamed it to py-sphere_deformer_r13 to better align with modern Cinema 4D terminology.

API Changes

Cinema API

• Added c4d.bitmaps.AllocateRenderBitmap().

• Added c4d.HNWeightTag.

• Added c4d.utils.KDTree.

• Added c4d.utils.KDTreeQuery.

• Removed c4d.modules.mograph.C4D_Falloff. Falloffs reached their end of life in release 2025 and were deprecated in release 2024.0. Please use fields to achieve falloff effects instead.

• Removed c4d.modules.mograph.FalloffDataData. Falloffs reached their end of life in release 2025 and were deprecated in release 2024.0. Please use fields to achieve falloff effects instead.

Maxon API

No changes

Mxutils API

No changes