Release Notes

9.8.1 release notes

  • Add Python 3 support.
  • Fix bug introduced in 9.8.0 that would crash Houdini when Tailored Cloth’s Reference Mesh had more points than its Start Mesh.

9.8.0 release notes

  • Add new functionality to choose between Face or Edge collision for SOP and DOP Carbon Cloth.

    When using Edge collision, it is recommended to switch to the Double Sided Cloth Guide Geometry for visualization of the simulated edges.

  • Add Edge Collision Weave example (SOP and DOP).

9.7.0 release notes

  • Improve SOP and DOP Carbon Cloth, Carbon Morph, and Carbon Collider Double Sided Guide Geometry by removing Front Offset and Back Offset. The values are now automatically taken from the corresponding values (Outer Fatness / Inner Fatness) in the main parameter interface.
  • Update SOP and DOP Carbon Stitching and Carbon Seaming point group functionality to allow for strings with duplicate indices. This means that a Carbon Stitching can have multiple stitches involving the same point.
  • Add Procedural Self-Stitching example to documentation. This illustrates how to use a Carbon Stitching to stiffen areas of a Cloth.

9.6.6 release notes

  • Turn Simulation Panic Timer node warning into an error (SOP and DOP).
  • Export “error” detail attribute to DOP Carbon Morph, Carbon Cloth, Carbon Collider, Carbon Tetra, Carbon Lattice, and Carbon Plumage.


There is a known bug in Houdini 17.0 and 17.5 where DOP errors do not correctly propagate to SOP in non-UI mode. This would lead to for example render commands still executing, even though the Carbon Simulation had triggered a panic timer; which in UI mode causes an interrupt. Please refer to the Known Issues section for more information.

9.6.5 release notes

  • Fix issue with DOP Carbon Binding, Carbon Welding, and Carbon Stitching that occurred when having multiple Bindings/Welding/Stitchings in one node. Parameters for all but the first Binding/Welding/Stitching were not taken into account correctly. These issues only occurred in Houdini 18.0 and 18.5 builds!
  • Resolve “emptyobject OP_Parameters::evalIntT(): Invalid parameter name sharedata” warnings on DOP Carbon Rigid Body nodes.
  • Resolve “<internal> Warning(33): incorrect number of #s in ‘objectA’ for multiparm depth of 1” type of warnings on DOP Carbon Binding and Carbon Welding nodes.

9.6.3 release notes

  • Add performance optimizations.
  • Add Cloth Twisting example to documentation.
  • Update Chain Mail and Angular Plasticity documentation examples and Start Pose documentation tutorial.

9.6.0 release notes

  • Improve Carbon licensing error messages.
  • Fix bug in Carbon Cloth Chain Mail Cloth Model and add support for quad meshes.
  • Add Cloth Chain Mail example to documentation.

9.5.2 release notes

  • Add Carbon Mesh Tool.
  • Fix issues with Carbon Welding in DOP.
  • Fix crash when using DOP Carbon Simulation’s Caching (beta) feature.

9.5.1 release notes

  • Add Velocity Reducer to Carbon Cloth, Carbon Tetra, and Carbon Morph.
  • Add significant performance optimization.
  • Fix Windows installer issues with paths containing whitespace characters.

9.4.0 release notes

  • Add Velocity import and export to Cloth, Morph, and Tetra.
  • Improve bend algorithm.
  • Improve Windows installer to work with OneDrive.
  • Fix Reference animation bug that was introduced in 9.3.0.

9.3.3 release notes

  • Add Houdini 18.0 support.

9.3.2 release notes

  • Add Carbon Simulation Time Warp parameter and example.

9.3.1 release notes

  • Fix issues with Binding Reference Parent Primitive Group.
  • Update Time Scale documentation.

9.3.0 release notes

  • Fix issues with Simulation Time Scale.

9.2.8 release notes

  • Fix issues with animated DOP Binding Activation.

9.2.7 release notes

  • Documentation updated.

9.2.6 release notes

  • Add NUMERION_FARM_UI_LICENSE environment variable to prevent batch processes from using Carbon UI licenses.

9.2.5 release notes

  • Fix Tetra issues in SOP constraints and goal posing.

9.2.4 release notes

  • Fix crash in Stitching in DOP when invalid Cloth/Tetra objects are specified.

9.2.3 release notes

  • Fix Binding and Welding issues in DOP concerning Standard Cloth.

9.2.2 release notes

  • Fix Binding painted attribute indexation issue.

9.2.1 release notes

  • Fix Binding painted attribute issue.

9.2.0 release notes

  • Add optional selection of primitives for collision to Cloth, Tetra, Collider, Morph.
  • Add Morph point selection to mark Cloth areas.
  • Add Binding and Stitching Reference.
  • Add warning when invalid geometry is used, for example tetrahedral geometry for Cloth.

9.1.3 release notes

  • Fix Carbon Rigid Body support in Carbon Filter in SOP.

9.1.2 release notes

  • Add warning when quad geometry is used with Tailored Cloth model.
  • Add All Downloads section to documentation.
  • Remove release notes for releases before 8.0.0.
  • Small documentation changes.

9.1.1 release notes

  • Significantly improved DOP and SOP performance when geometry is not animated.
  • Update sphinx to 1.7.9.
  • Small documentation changes.

9.1.0 release notes

  • Improved uniformity of tetrahedron mass distribution. Creating potential for higher quality simulation results, but less forgiving with bad tessellation.
  • Change Panic Timer to Panic Time and now apply specified time per subdivision, instead per frame.
  • Fix priorities in SOP Carbon Flow to match DOP Carbon Flow. Always use vdb file when specified.
  • Fix gcc6.3 compatibility.
  • Rework tetra.hip, tetra_sop.hip and tutorial_tetra.hip. Now with correct Tetrahedralization construction.
  • Small documentation changes.

9.0.2 release notes

  • Add Houdini 17 support.
  • Add Cloth Binding example to documentation Examples section.

9.0.1 release notes

  • Fix to ensure deterministic object ordering in the plug-in.
  • Improve documentation.

9.0.0 release notes

  • Add Angular Plasticity to all nodes with bending constraints.
  • New Carbon Welding painted attributes parameters for radius, stiffness, and viscosity (SOP + DOP).
  • Make N-Lattice and Plumage welding attributes paintable.
  • Major change to handling of wrinkle maps (now part of the reference pose).
  • Add tutorials video section to the documentation which points to the Carbon e-learning page.
  • Add examples section to the documentation.
  • Change Morph aerodynamics parameters to Base/Range model.
  • Drastically increase speed of the Carbon Attribute Copy node (up to <1000x faster for complex scenes) and add dropdown menu for easier input attribute selection.
  • Fix Plumage bug when simulating with 0 frames Growth Lead-In and non-animated Scales/Types
  • Improve Plumage and N-Lattice stability.
  • Add ability to use Plumage and N-Lattice in Carbon Filter.
  • Move Wrinkles Limit to Cloth reference parameters.
  • Add Carbon Attribute Names Version 9 Conversion node.
  • Add Animated Geometry checkbox to Collider (DOP).
  • Fix/Add Animated Material and Animated Aerodynamics checkbox to Rigid Body (SOP+DOP) and Rigid Body Array (DOP).
  • Fix image scale ratio issues in Linux documentation.
  • Set DOP Carbon Cloth and Carbon Morph Setup Mode defaults to Advanced.
  • Unifiy Density naming (Segment Density, Face Density and Tetra Density all become Density).
  • Rename Face parameters to Surface parameters.
  • Rename Segment parameters to Stretch parameters.
  • Rename Tetra (compression and extension) parameters to Volume (compression and extension).
  • Rename Drag to Form Drag.
  • Change parameter names of all animated flags from e.g. animDensity to densityAnimated.
  • Change Fatness to Outer Fatness for Cloth and Tetra.
  • Fix issue with animated Cloth aerodynamics parameters.
  • Remove file:/// from node documentation help links. This allows customers to place the documentation on a server.
  • Remove Cloth (DOP) stress attribute export from Standard Cloth mode.
  • Add checkboxes to make Cloth (DOP) stress attribute export optional for Advanced Cloth mode.
  • Add checkboxes to make Tetra (DOP) stress attribute export optional.
  • Update licensing software.
  • Cloth Flat Angles Limit and Seaming Angles Limit are now the same parameter: Flat Angle.

8.6.4 release notes

  • Replace Binding node affectors/affected callbacks by expression values to fix remaining issues caused with saving the node in an OTL file.
  • Add path to documentation examples’ links, so that the files can be found when the link does not work inside of Houdini’s browser.

8.6.3 release notes

  • Fix Binding node backward compatibility script to force affected/affector update when nodes are stored in an otl rather than hip file.
  • Fix Numerion tetra geometry export.

8.6.2 release notes

  • Fix Cloth and Tetra nodes paint maps guide geometry (SOP).
  • Add paintable aerodynamics attributes (drag, skin drag, and lift) to Cloth and Tetra nodes paint maps guide geometry (SOP + DOP).
  • Update Carbon Attribute Copy node reference documentation.
  • Replace component relationship nodes’ icons to make it more obvious that they are internal nodes.
  • Fix winding order method when reloading Numerion geometries.

8.6.1 release notes

  • Fix paintable Tetra aerodynamics (drag, skin drag, and lift) parameters (SOP + DOP).
  • Update drag, skin drag, and lift in Tetra and Cloth reference documentation.

8.6.0 release notes

  • Add paintable Cloth aerodynamics (drag, skin drag, and lift) parameters (SOP + DOP).
  • Fix SOP Binding and Parmfile script for python 2.6.
  • Fix crash in Numerion geometry export.
  • Fix Carbon Tetra double sided collision mode when inner fatness couldn’t be set to 0.

8.5.1 release notes

  • Fix Carbon Override Solver (DOP) broken in 8.5.0.
  • Fix Carbon Flow guide geometry crash (SOP + DOP).
  • Fix Carbon Morph that was using the end of frame pose instead of the end of time-step pose to update the reference geometry (SOP + DOP).
  • Fix unnecessary high anti-aliasing settings in most documentation hip files that caused major slowdown of Houdini.
  • Fix tutorial_pre-override.hip file in Houdini 16.

8.5.0 release notes

  • New Carbon Binding painted attributes parameters for radius, stiffness, and viscosity.
  • Fix the Carbon Binding object selection to be based on valid object names rather than on node names.
  • Add Carbon Binding parameter override to allow individual binding parameters per binding pairs.
  • Add groom mesh parameter for the Carbon N-Lattice node, fixing the Angle Limit in the process.
  • Improve the Carbon N-Lattice scaling.
  • Fix Actor position evaluation to allow the use of one single Carbon Actor node to hold multiple anchorage positions.
  • Add new DOP Carbon Simulation message management system to show the warning messages directly on the Carbon Simulation node.
  • Add Carbon Cloth Start Pose tutorial.

8.4.1 release notes

  • Add new Carbon N-Lattice user guide and fern tutorial.
  • Fix animated N-Lattice/Plumage scales when there is no growth lead-in time specified.

8.4.0 release notes

  • Add new Carbon N-Lattice node for simulating foliage, plumage, hair and other large lattice based geometries.
  • Add soft plumage welding parameters to allow movements away from the shaft and reduce feathers’ jitter when the rigid shaft is over-constraining the feather.
  • Fix soft plumage properties updates when the feather type attribute on the groom is animated.
  • Fix feathers’ mass distribution.
  • Fix animated plumage springs.
  • Fix animated plumage angles when there is no swing lead-in time specified.
  • Fix plumage growth so that the feathers’ scale doesn’t stay at the minimum scale for several frames.
  • Minor performance improvement during the plumage initializations.

8.3.1 release notes

  • Add new tutorial to demonstrate the new Carbon Override feature.

8.3.0 release notes

  • Add new Carbon Override solver (DOP) and Carbon Simulation Override node (SOP) to use Carbon simulation in a Houdini multi-solver setup.
  • Fix multiple “running python menu” errors in Carbon constraint nodes caused by a bug in Houdini 16 sending empty menu arguments (SOP + DOP).
  • Fix Carbon SOP solver output packed geometries caching issues where updated simulation geometry would not show correctly in viewport in some situations.

8.2.6 release notes

  • Add new documentation sections: License Check and Troubleshooting.

8.2.5 release notes

  • Add the missing Carbon SOP Simulation packed geometry output normals recalculation that is not done automatically in Houdini 16.0.
  • Fix the tutorials_avatar_sop example and the anisotropy userguide hip files to work in Houdini 16.0.
  • Fix the Linux installer to run with a potentially missing python2.6libs path as found from Houdini 16.0 installs.
  • Fix the Carbon SOP Simulation debug output time calculations and message.

8.2.4 release notes

  • Add Houdini 16.0 support.

8.2.3 release notes

  • Fix crash when using bypass on SOP simulation nodes.

8.2.2 release notes

  • Fix feather point reordering issue in hard plumages.
  • Remove unnecessary warnings when feather2 and feather3 geometries are not specified.
  • Fix the driving mesh in the Carbon Binding component node when a second affector is specified by mistake (DOP).

8.2.1 release notes

  • Improve the Linux installer script to allow the use of ~ in the paths.
  • Fix the Linux installer script where some random responses were accepted as a yes.

8.2.0 release notes

  • Add Linux installer script to facilitate and guide the installation on Linux platforms.

8.1.11 release notes

  • Fix the Carbon Plumage Mesh HDA tangent calculations that was giving the wrong orientation once an animated surface was specified.

8.1.10 release notes

  • Fix the Carbon Plumage Processor node that wasn’t clearing the existing geometry when used with an animated groom, causing the Carbon Plumage Mesh node to fail.

8.1.9 release notes

  • Fix crash that happened when switching on the Collider Collision Analysis geometry guide using a collider with no filtering gap.
  • Change default value to off for the Collider’s Self-Analysis toggle.

8.1.8 release notes

  • Fix animated goal pose that was using the Animated Geometry flag instead of the Animated Goal Pose one.

8.1.7 release notes

  • Fix Tetra/Cloth and Tetra/Tetra Binding.
  • Fix Collider node license information.

8.1.6 release notes

  • Improve license information in all Carbon nodes HDAs.

8.1.5 release notes

  • Update license display information in DOP and SOP Carbon Simulation HDAs.

8.1.4 release notes

  • Fix Parameter File messages to not do any UI import in batch mode.
  • Fix few more python 2.6 support issues.

8.1.3 release notes

  • Fix HDA scripts tabulation errors that appeared with python 2.6 support.
  • Fix crash on empty group constraints and on empty simulation objects created by new scene initializations code in 8.1.2 (SOP + DOP).

8.1.2 release notes

  • Add missing python 2.6 support.
  • Fix Avatar tutorial normals (SOP).
  • Add missing scene initializations introduced in 8.1.0 (SOP + DOP).

8.1.1 release notes

  • Fix Rigid Body activation problem introduced in 8.1.0 (SOP).
  • Fix activation initializations (mainly missing on the Morph) introduced in 8.1.0 (SOP + DOP).
  • Fix Collider crash when using meshes that are not consolidated. This Carbon bug was introduced in 8.0.1 when moving to Carbon 5.0. (SOP + DOP).
  • Fix crash in goal pose geometry guide when no goal pose is specified.
  • Fix the goal pose rigged and skinned tutorial by using cache workaround (Houdini graph evaluation bug introduced in 14.0).
  • Remove Actor warning message when no geometry is specified, since Actors can have no geometry attached.

8.1.0 release notes

  • Improve activation system to allow deactivation on init frame and a more consistent behavior.
  • Update Binding, Seaming, Draping, Stitching, Welding constraints to allow animated parameters (SOP + DOP).
  • Update Binding, Seaming, Draping, Stitching, Welding constraints to allow reset of reference at any time (SOP + DOP).
  • Allow SOP Simulation up to current frame behavior.
  • Add SOP Simulation missing guide geometries.
  • Add SOP nodes help URLs.
  • Fix broken goal pose rigged and skinned tutorial.
  • Fix winding order in Carbon geometry export.

8.0.1 release notes

  • Add soft (Cloth or Tetra) / soft Binding and Actor Welding.
  • Update docs for SOP simulation.

8.0.0 release notes

  • Add SOP Carbon Simulation and a SOP version of a subset of the DOP nodes: Cloth, Collider, Morph, Tetra, Rigid Body, Binding, Seaming, Stitching, Welding.