Yup, this is what I’ve been trying to do and kept running into issues (specifically, nothing from my texture would render).
But I think I finally figured out what I was doing wrong(?)… I was trying to apply the material for my render target texture to a sprite, but for some reason that acts really strangely. I ended up having to apply it to a model file (quad.dae), and that started rendering things correctly.
I don’t really understand why a model is required to do this, though. And it means I had to modify my appmanifest to bring Model+Rig back in just to do this effect which is kind of annoying.
This is what I’ve been using that has been the most hepful: Mastering Render Targets