Houdini 16.5 Shelf tools

Comb Fur shelf tool

Change the direction of hairs by painting.

On this page

Use this tool to change the direction of hairs in fur. Rarely do individual strands of hair stand straight up. Brushing them around gives the fur a more natural look.

After adding fur with the Add Fur tool, use the Comb Fur tool and some of the paint tools to style the fur. Finally, use the Add Dynamics tool to make the fur react to the character’s motion and external forces. When the character animates the fur gets transformed by the way the character moves.

Note

The combed direction affects the bend and twist results, so combing should be done before either of those operations.

Tip

The density values (fur density, white hair density, guard density) affect the distribution of hairs. If the position of existing hairs is important, you may want to use a texture map instead of the paint tools to further adjust the density.

Using Comb Fur

  1. Click the Comb Fur tool on the Fur tab.

  2. Set the Comb Lift, Radius, UV Radius, and Opacity on the operation controls toolbar.

    Note

    You can change the Radius of your brush by holding ⇧ Shift + and dragging or by changing the value in the Operation Controls toolbar.

  3. Hold and drag your cursor over the vector attributes you want to comb.

    You can turn on the Show Guide Geometry checkbox in the Operation Controls toolbar if you want to display the guides.

For specific parameter help see the Comb node help. For general brush information see the Brush tool help.

Tip

One parameter that you may want to adjust first is the Comb Noise parameter on the Hairs > Guide > Comb tab of the Fur Object.

You may also want to use the Paint Bend and Paint Twist tools on the Fur shelf to adjust the style of the combed fur.

Tips

Houdini will recook each time a brush stroke is made. To improve responsiveness while combing, reduce the Display Density on the Basic tab of the Fur Object. If this does not speed up Houdini enough, you can turn off the Display checkbox which will disable the display of hairs for improved responsiveness while you paint the geometry.

If you simply want to turn off the display of hairs for a moment when combing, you can hide other objects in the viewport by clicking in the viewer toolbar and selecting Hide Other Objects. This has the same effect on performance as turning off the Display checkbox on the fur object. Once you are done painting you can click and choose Show All Objects to display the fur again.

Once you comb the fur, you may want to use some of the paint tools to style the fur. You can paint attributes such as:density, length, clumping, base color, frizz, white hair density, guard hair density, and guard hair length.

See also

Shelf tools

Using the shelf

  • Customize the shelf

    How to change the look of the shelf, change and rearrange its contents, and create your own shelf tools.

Shelf tabs

  • Create tab

    Tools on the Create tab let you create and place primitives, curves, and null objects in the scene view.

  • Modify tab

    Tools on the Modify tab let you easily customize objects in the scene view.

  • Model tab

    Tools on the Model tab let you edit objects in the scene view.

  • Polygon tab

    Tools on the Polygon tab let you modify polygons in the scene view.

  • Deform tab

    Tools on the Deform tab let you deform objects in the scene view.

  • Texture tab

    Tools on the Texture tab let you texture objects in the scene view.

  • Rigging tab

    The Rigging tab contains tools for creating premade rigs.

  • Muscles tab

    The Muscles tab contains tools for creating muscles.

  • Characters tab

    Tools on the Character tab let you create characters in the scene view.

  • Constraints tab

    Tools on the Constraints tab create a constraint network where you can constrain objects to each other in the scene view.

  • Hair Utils tab

    Tools on the Hair Utils tab let you quickly set up hair and fur on objects.

  • Guide Process tab

    Tools on the Guide Process tab let you influence the placement and orientation of guide hairs by painting skin attributes.

  • Guide Brushes tab

    Tools on the Grooming tab let you add and directly manipulate hair.

  • Terrain FX shelf tab

  • Cloud FX tab

    The Cloud FX tab contains tools for creating cloud effects.

  • Volume tab

    The Volume tab contains tools for creating volume effects.

  • Lights and Cameras tab

    Tools on the Lights and Cameras tab let you create and place lights and cameras in the scene view.

  • Collisions tab

    Tools on the Collisions tab let you create collision objects in the scene view.

  • Particles tab

    Tools on the Particles tab let you create dynamic particle simulations.

  • Grains tab

    The Grains tab contains tools for simulate grains of sand and other granular matter.

  • Rigid Bodies tab

    Tools on the Rigid Bodies tab let you create dynamic RBD objects in the scene view.

  • Particle Fluids tab

    Tools on the Particle Fluids tab let you create particle based liquids in the scene view.

  • Viscous Fluids tab

    Viscous fluids are FLIP simulations that use a temperature attribute to drive viscosity.

  • Oceans tab

    The Oceans tab contains tools for creating ocean simulations.

  • Fluid Containers tab

    The Fluid Containers tab contains tools for creating pyro, smoke, and liquid containers.

  • Populate Containers tab

    The Populate Containers tab contains tools for creating and removing fire, smoke, and liquid.

  • Container Tools tab

    The Container Tools tab contains tools for manipulating fire, smoke, and liquid.

  • Pyro FX tab

    Tools on the Pryo FX tab let you create simulated smoke and fire effects.

  • Cloth tab

    Tools on the Cloth tab let you create and constrain cloth objects in the scene view.

  • Solid tab

    Tools on the Solid tab let you create and modify solid objects.

  • Wires tab

    Tools on the Wires tab let you create flexible dynamic objects in the scene view.

  • Crowds tab

    The Crowds tab contains tools for creating crowds, crowd behaviors, as well as examples.

  • Drive Simulation tab

    Tools on the Drive Simulation tab let you manipulate dynamic objects in the scene view.

Technical