OTOY Forums

Hey,

For example, adjusting light power on a light / geo node emission will trigger an update in the IPR.
If you link the parameter to something else and then adjust it, IPR will not update.
It's pretty inconvenient for light rig HDAs.

Perhaps your workflow has this problem because the Houdini events system is not reporting the parameters that are being updated from expressions or parent objects.

I’m not sure if something like that can be resolved in the external renderers, I’ll take a look at it at some point, but currently, your best workaround can be to add a callback script to the parameters affecting other objects (or to the expressions) to touch any of the parameters of the main object or you could even add the “Octane_IPR_update” command to force an IPR update.

Hope it helps,
-Juanjo