Hi There, im having trouble with an unconventional
rop otl i could really use a hand with. There is a top
level multiparm interface to sops which needs to
setup channel references to underlying ROPs in a
locked HDA. I have a def in the otls PythonModule
that populates everything fine prior to the render.

Now I have a requirement to do this at render time.
so i moved the ‘callback’ into a python Pre-Render
Script of a shell node.
hou.node('..').hdaModule().updatePaths(hou.node('..')

The problem im running into is that when i invoke
render -V on the node, the paths don't update until
AFTER the render completes, but i need them to update
BEFORE the rest of the network renders.

Any ideas? Im using 10.0.345

i should add that the def in the PythonModule worked
when setup as a parameter callback, but invoking the
same code from a shell node as a python prerender
script inside the rop otl runs when expected, but
does not update the otls parameters until the render
completes. i need a workaround!