> I'm new to Pov-ray. I wanted to know if instead of rendering a camera-like
> image, it is possible to saye rays (position x,y,z and cosine directions)
> into a file?

No, it's always an image produced... but there is an orthographic camera
that produces a flat image with no perspective.

If you place a light behind the camera and use hf_gray_16 then you
can get a grayscale image with depth info suitable for height_field use.

Or you can use gradient textures, either way the output image has
depth info as luminance.

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