[Closed] ObjectID modifier – need help

gbufferchannel is NOT animatable property and you can change it during rendering.

but you can change it before rendering starts using for example #preRender general callback.
if it’s OK you shouldn’t care about ‘two-way’ wiring, and you can set the value of your attribute as gbufferchannel every time before rendering starts.

so all you need is to be able to find all objects with ‘objectID’ attribute added, and change their gbufferchannel property value to the value set in the attribute.