How to globally add a parameter to multiple scene states

Hey everyone,

I’m building a SceneSwitcher system in TouchDesigner for OBS.

Each scene shares the same structure only the values change. For example, parameters like:

•	WebcamScale

•	WebcamTranslate1

•	WebcamTranslate2

•	AudioVolume

•	ScreenCaptureTranslate1

•	ScreenCaptureScale

Right now, I’m using one Constant CHOP per scene. So if I have 8 scenes, I have 8 Constant CHOPs with identical channels, just different values.

It works, but the issue is scalability.

If I want to add a new parameter (for example, adding a new visual control or another transform value), I have to manually add that channel to all 8 scenes. That’s tedious and error-prone.

I’ve looked into Replicators, but adding a new custom parameter to the master COMP requires regenerating the replicas which resets existing values. So that doesn’t really solve the problem.

What I’m really looking for is a clean, data-driven way to:

•	Keep one shared parameter structure

•	Store different values per scene

•	Add new parameters globally

•	Without wiping or manually editing every existing scene

How would you structure this in a scalable way?

Thanks!