Houdini 18.5 Solaris

Solaris scene viewer

Describes the differences/enhancements in the Solaris viewer compared to the Houdini object/SOP viewer.

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Viewport options menu

  • In the viewport options menu you can choose the render delegate to use to render each viewport (below the Set View submenu).

  • In the Set View submenu you can set a viewport in a split view to "Image", which shows a rendered image of the scene.

  • The UV viewport type is not available.

Display options

To open the Display Options, click the button in the display toolbar to the right of the viewport, or move the mouse pointer over the viewport and press D.

  • The Render tab in the display options contains render delegate-specific options.

  • On the Guides tab, you can show the render time and render stats from the render delegate.

Render delegates

USD uses a generic rendering interface called Hydra. As long as a third party viewer or renderer implements the Hydra API, Houdini can use it to render the USD stage in the Solaris view.

  • By default, you can choose between the native Houdini GL view and the new Karma renderer.

  • If you have other Hydra delegates (for example, Pixar’s RenderMan and Storm GL delegates) installed where Houdini can find them, they will appear in the viewport options menu.


You need to make sure the render delegate is found by the USD plug-in search, using the PXR_PLUGINPATH_NAME environment variable.

You can also set the environment variable TF_DEBUG to PLUG_*, which causes the USD library to print out useful information as it scans for and loads plug-ins.




Karma renderer