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] Simplified connection list parameter using AutoConnect (e.g. Volume selection on Voxelize tag).
  • [C4D] Improved performance of geometry bridging (e.g. Voxelize tag on C4D objects).
  • [C4D] Show icons in channel- and connection-lists.
  • [C4D] Viewport preview was broken after Render View.
  • [C4D] Enumerator lists did not update in some cases.
  • [C4D] Fixed: animation of some parameters did not work correctly.
  • [C4D] Fixed: list items got unchecked when selection changed.
  • [C4D] Fixed: drag&dropping tags did not reconnect the nodes correctly in some cases.
  • [C4D] Fixed: crash when aborting CPU render by continuing GPU sim.
  • [C4D] Fixed: velocity channel was not available via TFD legacy render bridge.
  • [C4D] Fixed: volume channel selection UI did not update selection correctly.
  • [C4D][Undo] Some parameter changes did not trigger a sim update.
  • [Cache] Cache was not set dirty by parameter changes in some cases.
  • [Cache] Incomplete caches (e.g. no velocity) were not updated correctly in some cases.
  • [Cache] Re-enabled loading of partial volumes.
  • [Cache] Clear Cache did not invalidate locked files.
  • [DFG] Improved evaluation performance in most cases.
  • [Framework] Stored login was lost in some cases, causing login prompts on startup.
  • [Rake] Added missing error message for some invalid const and variable declarations.
  • [Samples] Added Smoke Hidden Source sample.
  • [Templates] Removed test scenes from templates menu.
  • [Templates] Made scale of templates more practical and consistent.
  • [UI] ColorGradient: 'faded' checkbox status was not restored correctly in some cases.
  • [UI] Order of parameter UI of some nodes was not consistent.
  • [UI] Fixed: Node layout was not adjusted when auto-connecting nodes in some cases.
  • [Undo] AutoConnect was not undone correctly in some cases.
  • [UserGuide] Added Turbulence page.
  • [UserGuide] Updated Voxelize page.
  • [Viewport] Fixed issue when switching used simulation GPU.
  • [Volume] Decay: added option to control decay with a mask channel.
  • [Volume] Advection: added option for Modified MacCormack method.
  • [Volume] Advection: added option for Adaptive Tracer method.
  • [Volume] Voxelize: apply parameters to all objects io. using per-object parameter groups.
  • [Volume] Voxelize: added global Intensity parameter for convenient animation of all volume channels.
  • [Volume] Turbulence: added Perturbation operator.
  • [Volume] Turbulence: renamed parameter group Noise to Swirls.
  • [VolumeMaterial] Black Body gradient: added saturation parameter.