nascentparadigm

I was experimenting with live compositing workflows with Solaris and COPs, and curious to know if it is, or should be, possible to get the output from a USD Render ROP into a COP network using the render COP.

When I tested that workflow, I got this error:


Not sure if I'm using the wrong node(s), or if this feature/workflow has not been implemented.

I'm trying to create a Python Panel that provides me with a custom editor based on node selection. However, I can't find a good way of detecting when selection has changed, or what the current/last selected node is.

I see that there are callbacks that I can add on a per-node basis, but I feel like there is a feature that works more globally, like how all the native editors work, and I can't seem to find how to hook into it… (ie the Parameters panel, which updates based on node selection).

So I am using an input curve and animated attributes in Maya to drive a pseudo-particle animation inside of my OTL. I would like to bake that animation from inside of my OTL to bgeo files for use in other aspects of our pipeline.

I promoted the Framerange controls and “Render” button of an internal ROP output driver to my top level controls, so that I can control them inside of Maya. The problem is it doesn't look like the Maya timeline is updated if the timeline is controlled by one of Houdini's internal iterators (like a ROP or cache node).

As an example - If I set my framerange from 1 to 48, and hit “Render”, then I will get 48 frames of bgeo files - unfortunately, they're all exactly the same - ie if the timeline was on frame 24 in Maya, then I'll get 48 duplicate bgeo files of frame 24. Houdini iterates through the frames specified, but the Maya timeline isn't updated or moved to reflect that change, so the geometry isn't re-evaluated before export. It's almost as though there's a Timeshift at the end of my network that's set to whatever the current Maya frame is.

Is there a way to get Maya/Houdini to sync up when exporting from ROP's?