Houdini 17.0 Shelf tools

Melt Object shelf tool

Creates a melting object from geometry.

This tool turns a geometry object into a particle fluid with a temperature attribute that affects the viscosity of the object. You would typically want to use this tool whenever you have an object that will change state over time. For example, you could use this tool to create a warm chocolate bunny that would slump over and then cool off and become solid.

Tip

You will often want to use this tool in conjunction with the Heat Within Object shelf tool, which would allow you to have an object that melts when it comes in contact with the temperature generated from another object.

Note

The difference between this tool and Lava From Object is that this tool doesn’t apply any shader. The Lava From Object assigns a shader to get a basic glowing lava look.

Using Melt Object

  1. Create a geometry object to be converted into a melting object.

  2. Click the Melt Object tool on the Viscous Fluids tab.

    For specific parameter information, see the FLIP Object and Gas Temperature Update help pages.

Tips

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Change how quickly the objects starts to melt

Modify the Temperature parameter on the Physical tab of the FLIP Object. This parameter sets the initial temperature of the object. The default value is 0.5, which will cause it to melt immediately, since the object starts off quite warm. A higher value will give you very hot, free-flowing liquid which cools over time and a lower value would give you cool, highly viscous fluid that heats up and melts.

Change the look of the fluid

Adjust the Minimum/Maximum Viscosity parameters on the Gas Temperature Update node. A value of 100,000 is very stiff, which should retain it’s shape, and a value of 0 is completely liquid, like water.

Control how quickly a hot temperature will cool off

Modify the Outer/Inner Cooling Rate parameters on the Gas Temperature Update node. The Outer Cooling Rate refers to the rate of change on the surface of the object, while the Inner Cooling Rate refers to how fast the temperature changes inside the fluid. Generally, the inner cooling should be lower than the outer, since the inside of the object is insulated and retains more heat, as opposed to the exterior which loses heat more quickly due to the surrounding air.

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.

  • Vellum tab

    The Vellum tab contains tools for creating different types of vellum effects.

  • 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.

  • 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