Houdini 13.0 What’s new

Edge groups

Houdini can now create groups of edges (previously you could only group primitives or points).

Other surface nodes have been updated to work with edge groups. For example, you can specify an edge group to preserve in the Poly Reduce node, or to cusp in the Edge Cusp node.

To...Do this
Create an edge group
  • In the toolbox, click the Select tool and set the Geomtry select mode to Edges (or press 3). Select the edges you want to group, then on the Model shelf tab click Group geometry.


  • In the network editor, create a Group Geometry node. In the parameter editor, set Entity to “Edges”.

    As with point and primitive groups, you can select edges by number (on the Number tab), or select all edges inside an arbitrary bounding box (on the Bounding tab).

The Group Geometry node now includes an additional Edges tab with controls for filtering the selected edges based on various criteria, such as the angle between edges.

You can script edge selections using hou/Edge and hou/EdgeGroup.

Orbolt browser pane

To use assets downloaded from the Orbolt store, click the New Tab button in a pane and choose New pane type > Orbolt asset browser.

The pane lets you:

  • View downloaded assets.

  • Drag them into your Houdini scene.

  • Check for asset updates.

  • Synchronize the assets on your machine with your assets from the store.


  • New shelf tools to automate cloth capture and deform.

  • Improved collisions.

  • Optimizations to cloth simulations.

Wire solver

  • New Spring Network Constraint node for wire simulations.

  • Spring Network Relationship node.

  • More accurate collisions. The wire solver collider now use a surface representation for collisions instead of voxels/SDFs by default.

    The new method is slower than using SDFs, but much faster than if you turned up the SDF accuracy to the equivalent of the new method. You can enable the old behavior using a parameter in the Wire solver node.


  • Alembic: Houdini now imports more geometry property types, including 64-bit integers and 16-bit floats.

  • Soft Transform SOP now supports local space deformations.

  • Many enhancements to OpenGL 3 mode in the 3D viewport.


  • Houdini now exports volume primitives to RIB streams.

  • Added support to SOHO for intrinsic geometry types.


Houdini is compatible with OpenVDB 0.9.


  • Central help server setups can now index help inside assets if you include @nodes in the docs section in the configuration .ini file. Note that this uses a Houdini license while indexing.

  • The indexing script can now index node usages in example .otl files. Previously this wasn’t available in central help server setups. You must pass the --usages (or -u) flag to the script to enable this.

    % index.py --usages deploy.ini