OTOY Forums

• New $OCTANE_PASS_NAME variable for output paths (Octane ROP and Solaris). It expands to the pass's readable name. The existing $OCTANE_PASS still gives the short name.
• Float Image texture: choose the output type. The output can now be float or color3. Scenes saved with earlier versions open with color3, so they render as before.
• Animated OBJ display parameter is supported, so IPR will match Houdini's native viewport when OBJ's display parameter is used.

• The IPR snapshot now matches the current render region / film region.
• Ctrl + mouse zooms the canvas in render region, film region and snapshot compare modes; tooltips show when canvas pan and zoom are available.
• The image buffer was reworked, so the display is more reliable.

• MaterialX nodes that are Octane node graphs are now supported (e.g. mtlx separate nodes).
• createPackageFileForOctane_NoSceneIndex.bat should be no longer needed, and will be removed from future releases, so please report any problems with createPackageFileForOctane.bat

• Fixed a crash when clearing the Tile Grid image node's File List.
• Fixed instanced analytic lights losing their instance color when reloaded.
• Fixed ORBX exports missing assets for scenes with RGB image nodes using COP buffer.
• Fixed the Texture Switch input slider having a huge maximum.
• Solaris: octane:* camera or light properties now updates the IPR straight away.
• Solaris: the Universal Camera's custom aperture color space parameter no longer fills the undo history.

{
    "enable": true,
    "env": [
        {
            "OCTANE_AUTOSPAREPARAMS": {
                "value": 1
            }
        },
        {
            "OCTVERSION": "<path_to_plugin_directory>"
        },
        {
            "HOUDINI_PATH": {
                "value": "$OCTVERSION"
            },
            "HOUDINI_MENU_PATH": {
                "value": "$OCTVERSION/config/Menus"
            },
            "HOUDINI_SCRIPT_PATH": {
                "value": "$OCTVERSION/scripts"
            },
            "PATH": {
                "value": "$OCTVERSION/bin"
            },
            "PXR_PLUGINPATH_NAME": {
                "value": "$OCTVERSION/dso/usd_plugins"
            }
        }
    ]
}

frankserin wrote: Thu Oct 15, 2026 6:43 pm Solaris IPR Does Not Update Material Changes Without Resetting the Render

I'm experiencing a persistent issue with OctaneRender in Houdini Solaris that has been present for several versions, including OctaneRender 2026.6.0.0 for Houdini Production.

Whenever I make changes to a material in Solaris, the IPR fails to update automatically. This happens when modifying existing nodes, connecting new nodes, or changing the material network.

To see the changes, I have to manually reset the render every time. This significantly disrupts the lookdev workflow, making material iteration unnecessarily slow and frustrating.