Reactions User Guide



Download Windows Installer
Installation Instructions

System Requirements

  • Windows 8.1 or later
  • GPU simulation requires an Nvidia GPU with CUDA CC 3.5 or later (see
  • (optional) Cinema 4D R20 or later
  • (optional) Redshift v3.0.53 or newer.


  • [C4D] Added basic support for C4D's instancing via Particle Emitter.
  • [C4D] Fixed crash when when loading scenes in some cases.
  • [C4D] Fixed missing final viewport update in some cases when dragging handles.
  • [C4D] Fixed crash in some cases when render-to-PV completes.
  • [C4D] Fixed an issue with multiple open projects using REA nodes.
  • [C4D] Fixed Octane Live Viewer not updating in some cases when stepping by single frames.
  • [C4D] Fixed viewport preview not re-appearing in some cases after undo/redo.
  • [Framework] Use display GPU as the default compute device.
  • [Graph] Fixed error in some cases when switching compute device during playback.
  • [Graph] Fixed failure to auto-connect material when adding multiple nodes of the same type.
  • [Installer] Show error on implicit downgrade attempt to prevent empty installs.
  • [Meshes] PolyMesh node did not update correctly when changing import path.
  • [Particles] Use a simple expression io. a code snippet for shape-defined birth.
  • [UI] Add (Display) tag to GPU name in Primary Device selection.
  • [UI] Renamed Attributes tab to Parameters.
  • [Undo] Fixed: bundle-fiber and volume channel selections were not restored correctly on redo.
  • [User Guide] Added Particle Emitter page.
  • [Viewport] Fixed: volumes did not render on secondary GPUs in some cases.