Among onther things, myself wrote:

>> 3 looks somewhat distorted... there
>> must be something I didn't take into account. It's also clipped, because
>> the "photodetector camera" was not wide enough to capture light from
>> every possible direction. And it's too noisy, that could be due to
>> incomplete antialiasing.
> 
> I meant "2", I had to change the numbering because knode sorts the
> attachments alphabetically...
> 
> Anyway, there was something missing, when creating the reference image,
> the light should be projected through the same view field the camera has
> in the primary image, here is the corrected "reference.png", much more
> similar to "reconstructed.png"

... and with +R9 in the antialiasing options a much better result is
obtained for "reconstructed.png" itself. Now the checker structure is
evident, it works!

The problem is... is this useful at all?

-- 
light_source{9+9*x,1}camera{orthographic look_at(1-y)/4angle 30location
9/4-z*4}light_source{-9*z,1}union{box{.9-z.1+x clipped_by{plane{2+y-4*x
0}}}box{z-y-.1.1+z}box{-.1.1+x}box{.1z-.1}pigment{rgb<.8.2,1>}}//Jellby

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Download 'reconstructed.png' (9 KB)

Preview of image 'reconstructed.png'