Add another color attachment to fragment shader

[tesfabpel]

Hi, I don't know how to add another color attachment to the fragment shader in bevy.
I need it to have an output texture that stores the fragment's 3D position to be able to read it back when the mouse moves (so that I can show the 3d position of the mouse for debugging). Of course at the beginning of the render pass I also need to clear it as well...
Thank you.