Switch between cameras looking at different objects

I’m new to Touchdesigner, coming from a 3d background using Blender. I have been watching tutorials and playing around for a week and the first project I am working on is trying to replicate this - https://www.instagram.com/anastasialapotko/reel/DEFtlbWtVQI/

I have created some cubes that I’m happy with (for now), so now I am trying to figure out how to switch between the cubes using audio. I followed a audio reactive tutorial so I think I can figure out how to make the audio change the active cameras but before I try that I’m struggling to figure out how to setup multiple renders, each with their own camera and then merge them all into one output. The problem is that I currently have different colour/feedback TOP settings between the render and output of each cube so I’m hoping there is a way to have multiple renders all go into one final render then output.