Capturing output from a Camera3D to an image file

[civic bay]

Is there a nice easy way to capture the output from a camera3d (not the game's viewport) to a texture or a saved image file?

Attempting to make a top-down game about photography.

[unkempt oyster]

you should look into subviewports.

I gave a brief response to somebody else here: #1234999754270707792 message