Splitting Projection Mapping for Sphere

Hi All,
I am building a TouchDesigner setup for my school project which is the interactive wind mapping. I have one projector to mapping so I am using mirrors to split and project to whole sphere. Here is setup what I think to build:

I have some questions about mapping on TD for my case:

  • I am getting the map visual with Web Renderer TOP on 2D; should I convert World Map to 3D Sphere Earth before projection mapping or not?

  • Building this setup has no too many return possibility because of cutting mirrors and more, so is there a way to simulate this building on TD?

  • My last and most important question for me is that I watched too many TD mapping video but couldn’t find to split 4 and mapping it on sphere, could you recommend me a way to do this?